{"year":1920,"y":501.43259,"x1":3.00684,"x2":1,"e":-0.31912}
{"year":1921,"y":503.77555,"x1":6.44365,"x2":1,"e":0.91464}
{"year":1922,"y":502.86414,"x1":3.76558,"x2":0,"e":1.42274}
{"year":1923,"y":501.91559,"x1":9.05878,"x2":0,"e":-1.0991}
{"year":1924,"y":503.178,"x1":7.13083,"x2":1,"e":-0.60471}
{"year":1925,"y":502.76604,"x1":6.97444,"x2":1,"e":-1.22757}
{"year":1926,"y":500.67334,"x1":5.05491,"x2":0,"e":-2.09039}
{"year":1927,"y":502.40233,"x1":6.34574,"x2":0,"e":-0.9341}
{"year":1928,"y":503.83202,"x1":6.14413,"x2":0,"e":0.29598}
{"year":1929,"y":503.55334,"x1":6.80736,"x2":0,"e":-0.3985}
{"year":1930,"y":504.89094,"x1":1.9009,"x2":1,"e":0.91571}
{"year":1931,"y":506.24056,"x1":7.04528,"x2":1,"e":0.72924}
{"year":1932,"y":504.88512,"x1":5.30017,"x2":1,"e":-0.43993}
{"year":1933,"y":504.90865,"x1":3.68007,"x2":1,"e":-0.26137}
{"year":1934,"y":501.65406,"x1":3.01082,"x2":0,"e":-2.59864}
{"year":1935,"y":505.74167,"x1":8.94492,"x2":1,"e":-1.24456}
{"year":1936,"y":503.99498,"x1":4.1164,"x2":0,"e":-1.03412}
{"year":1937,"y":505.46325,"x1":3.19873,"x2":0,"e":0.41357}
{"year":1938,"y":504.59191,"x1":4.69882,"x2":0,"e":-1.08279}
{"year":1939,"y":507.59561,"x1":3.34421,"x2":1,"e":1.00956}
{"year":1940,"y":505.1301,"x1":8.97165,"x2":0,"e":-2.11281}
{"year":1941,"y":507.1328,"x1":5.08801,"x2":0,"e":0.6108}
{"year":1942,"y":508.25861,"x1":4.19144,"x2":1,"e":0.71075}
{"year":1943,"y":506.97612,"x1":4.054,"x2":0,"e":0.21262}
{"year":1944,"y":508.53499,"x1":4.17035,"x2":0,"e":1.4924}
{"year":1945,"y":508.25124,"x1":6.36647,"x2":0,"e":0.40963}
{"year":1946,"y":508.54953,"x1":6.3804,"x2":1,"e":-0.54557}
{"year":1947,"y":508.69658,"x1":6.06698,"x2":0,"e":0.42983}
{"year":1948,"y":508.24611,"x1":4.62779,"x2":1,"e":-0.91084}
{"year":1949,"y":507.67206,"x1":5.76589,"x2":0,"e":-1.01941}
{"year":1950,"y":511.85272,"x1":5.75237,"x2":1,"e":1.91463}
{"year":1951,"y":511.01708,"x1":7.30706,"x2":0,"e":1.44032}
{"year":1952,"y":510.20377,"x1":8.14981,"x2":0,"e":0.16632}
{"year":1953,"y":509.18885,"x1":6.17705,"x2":1,"e":-1.60542}
{"year":1954,"y":510.37474,"x1":3.76991,"x2":1,"e":-0.06774}
{"year":1955,"y":509.88703,"x1":4.54218,"x2":0,"e":0.00149}
{"year":1956,"y":507.7928,"x1":5.12783,"x2":0,"e":-2.48916}
{"year":1957,"y":509.5161,"x1":4.37305,"x2":0,"e":-0.82717}
{"year":1958,"y":508.72267,"x1":4.503,"x2":0,"e":-1.90308}
{"year":1959,"y":511.91302,"x1":4.69241,"x2":0,"e":0.98991}
{"year":1960,"y":512.17223,"x1":3.72949,"x2":1,"e":0.23986}
{"year":1961,"y":509.72953,"x1":4.99241,"x2":0,"e":-1.76857}
{"year":1962,"y":511.91851,"x1":5.09123,"x2":0,"e":0.1457}
{"year":1963,"y":513.78833,"x1":6.36814,"x2":1,"e":0.44629}
{"year":1964,"y":513.71564,"x1":4.49591,"x2":1,"e":0.59166}
{"year":1965,"y":513.43058,"x1":4.69792,"x2":0,"e":1.0061}
{"year":1966,"y":513.14883,"x1":3.25014,"x2":0,"e":0.8363}
{"year":1967,"y":512.46728,"x1":1.0462,"x2":0,"e":0.45573}
{"year":1968,"y":514.93045,"x1":5.47533,"x2":1,"e":0.56162}
{"year":1969,"y":516.00305,"x1":5.07218,"x2":1,"e":1.48501}
{"year":1970,"y":514.72908,"x1":5.2698,"x2":1,"e":-0.08836}
{"year":1971,"y":515.13993,"x1":5.23516,"x2":1,"e":0.08114}
{"year":1972,"y":515.22535,"x1":3.34882,"x2":0,"e":1.38815}
{"year":1973,"y":514.40897,"x1":0.72953,"x2":1,"e":-0.02341}
{"year":1974,"y":516.8447,"x1":5.42842,"x2":1,"e":0.98759}
{"year":1975,"y":514.38177,"x1":3.10586,"x2":0,"e":-0.1447}
{"year":1976,"y":515.32073,"x1":3.69672,"x2":1,"e":-0.60345}
{"year":1977,"y":515.67456,"x1":6.45741,"x2":0,"e":-0.1898}
{"year":1978,"y":517.14752,"x1":7.09956,"x2":0,"e":0.87263}
{"year":1979,"y":514.84861,"x1":5.20393,"x2":0,"e":-1.20237}
{"year":1980,"y":518.25483,"x1":8.19398,"x2":1,"e":0.20633}
{"year":1981,"y":517.49561,"x1":6.12817,"x2":1,"e":-0.28643}
{"year":1982,"y":520.54181,"x1":4.68928,"x2":1,"e":2.86949}
{"year":1983,"y":516.20692,"x1":2.64907,"x2":1,"e":-1.20535}
{"year":1984,"y":516.77379,"x1":4.71571,"x2":0,"e":-0.40513}
{"year":1985,"y":519.20253,"x1":6.80157,"x2":1,"e":0.25213}
{"year":1986,"y":520.04627,"x1":5.71635,"x2":0,"e":2.11718}
{"year":1987,"y":518.2597,"x1":3.16296,"x2":1,"e":-0.28104}
{"year":1988,"y":519.23532,"x1":2.35595,"x2":1,"e":0.64633}
{"year":1989,"y":517.41101,"x1":5.4556,"x2":1,"e":-2.20289}
{"year":1990,"y":518.96327,"x1":4.30429,"x2":0,"e":0.3872}
{"year":1991,"y":520.68054,"x1":7.60145,"x2":0,"e":1.03018}
{"year":1992,"y":519.65416,"x1":4.55071,"x2":0,"e":0.51649}
{"year":1993,"y":518.29943,"x1":-0.19373,"x2":0,"e":0.09787}
{"year":1994,"y":520.21645,"x1":3.15653,"x2":1,"e":-0.07268}
{"year":1995,"y":520.72064,"x1":7.93757,"x2":0,"e":-0.01376}
{"year":1996,"y":517.05745,"x1":3.12108,"x2":0,"e":-2.72282}
{"year":1997,"y":520.48648,"x1":3.29827,"x2":0,"e":0.41191}
{"year":1998,"y":522.81209,"x1":8.32187,"x2":0,"e":1.23162}
{"year":1999,"y":522.91154,"x1":2.28495,"x2":1,"e":1.59031}
{"year":2000,"y":520.78277,"x1":5.17201,"x2":0,"e":-0.51023}
{"year":2001,"y":524.46267,"x1":7.50316,"x2":1,"e":1.33688}
{"year":2002,"y":521.16456,"x1":6.22024,"x2":0,"e":-0.8905}
{"year":2003,"y":521.4568,"x1":5.04077,"x2":1,"e":-1.55339}
{"year":2004,"y":524.98257,"x1":6.44508,"x2":1,"e":1.3713}
{"year":2005,"y":522.33693,"x1":2.78315,"x2":1,"e":-0.60886}
{"year":2006,"y":523.18977,"x1":6.53957,"x2":0,"e":0.05487}
{"year":2007,"y":522.393,"x1":7.05424,"x2":0,"e":-1.12056}
{"year":2008,"y":524.70659,"x1":5.14585,"x2":0,"e":1.42012}
{"year":2009,"y":524.95679,"x1":2.37105,"x2":1,"e":1.11403}
{"year":2010,"y":524.33298,"x1":5.38949,"x2":0,"e":0.48561}
{"year":2011,"y":525.22146,"x1":6.18312,"x2":1,"e":-0.07432}
{"year":2012,"y":524.05643,"x1":3.14794,"x2":1,"e":-0.73056}
{"year":2013,"y":525.1352,"x1":3.42519,"x2":0,"e":1.0289}
{"year":2014,"y":524.3824,"x1":6.17355,"x2":1,"e":-1.66099}
{"year":2015,"y":524.35181,"x1":6.07912,"x2":0,"e":-0.91797}
{"year":2016,"y":525.42189,"x1":7.17397,"x2":1,"e":-1.3716}
{"year":2017,"y":526.49224,"x1":5.26204,"x2":0,"e":0.92673}
{"year":2018,"y":525.80587,"x1":4.21363,"x2":1,"e":-0.74754}
{"year":2019,"y":525.98109,"x1":9.04138,"x2":0,"e":-1.02925}