Year,Mean,Uncertainty
1959,315.98,0.12
1960,316.91,0.12
1961,317.64,0.12
1962,318.45,0.12
1963,318.99,0.12
1964,319.62,0.12
1965,320.04,0.12
1966,321.37,0.12
1967,322.18,0.12
1968,323.05,0.12
1969,324.62,0.12
1970,325.68,0.12
1971,326.32,0.12
1972,327.46,0.12
1973,329.68,0.12
1974,330.19,0.12
1975,331.13,0.12
1976,332.03,0.12
1977,333.84,0.12
1978,335.41,0.12
1979,336.84,0.12
1980,338.76,0.12
1981,340.12,0.12
1982,341.48,0.12
1983,343.15,0.12
1984,344.87,0.12
1985,346.35,0.12
1986,347.61,0.12
1987,349.31,0.12
1988,351.69,0.12
1989,353.20,0.12
1990,354.45,0.12
1991,355.70,0.12
1992,356.54,0.12
1993,357.21,0.12
1994,358.96,0.12
1995,360.97,0.12
1996,362.74,0.12
1997,363.88,0.12
1998,366.84,0.12
1999,368.54,0.12
2000,369.71,0.12
2001,371.32,0.12
2002,373.45,0.12
2003,375.98,0.12
2004,377.70,0.12
2005,379.98,0.12
2006,382.09,0.12
2007,384.02,0.12
2008,385.83,0.12
2009,387.64,0.12
2010,390.10,0.12
2011,391.85,0.12
2012,394.06,0.12
2013,396.74,0.12
2014,398.81,0.12
2015,401.01,0.12
2016,404.41,0.12
2017,406.76,0.12
2018,408.72,0.12
2019,411.65,0.12
2020,414.21,0.12
2021,416.41,0.12
2022,418.53,0.12
2023,421.08,0.12
2024,424.61,0.12
2025,427.35,0.12