year,value
1893,9.490001
1894,6.2900014
1895,6.7100005
1896,13.040004
1897,9.340001
1898,9.360004
1899,10.190002
1900,8.180001
1901,6.6700015
1902,8.569999
1903,12.820001
1904,9.200003
1905,11.360004
1906,8.210002
1907,6.2599993
1908,12.210001
1909,10.34
1910,4.98
1911,7.930002
1912,7.870002
1913,12.340002
1914,7.570001
1915,9.740001
1916,8.850001
1917,10.200005
1918,9.680001
1919,10.060006
1920,10.760001
1921,9.309999
1922,8.820001
1923,7.830002
1924,5.770001
1925,4.330001
1926,4.55
1927,11.719999
1928,6.2100015
1929,8.420001
1930,7.490001
1931,7.040001
1932,7.5400004
1933,8.219999
1934,3.429999
1935,8.27
1936,5.0400004
1937,8.56
1938,11.470001
1939,5.9900007
1940,7.2299995
1941,6.7200003
1942,7.5300016
1943,8.520003
1944,13.17
1945,13.700004
1946,9.840003
1947,10.280002
1948,7.5300007
1949,6.600002
1950,10.130003
1951,16.37
1952,9.940001
1953,9.600001
1954,10.700002
1955,8.900001
1956,8.390002
1957,10.46
1958,5.1100006
1959,13.070003
1960,12.950005
1961,10.570002
1962,8.68
1963,8.549999
1964,10.39
1965,11.990004
1966,7.6600013
1967,8.620001
1968,8.370001
1969,8.270001
1970,10.72
1971,6.19
1972,9.720003
1973,16.210003
1974,12.47
1975,9.460003
1976,10.0199995
1977,10.410004
1978,8.900003
1979,9.950003
1980,6.420001
1981,6.580001
1982,11.980001
1983,10.770003
1984,12.32
1985,7.680002
1986,12.110002
1987,9.030004
1988,4.3399997
1989,5.390001
1990,12.170003
1991,15.090002
1992,7.4100027
1993,11.870002
1994,4.52
1995,13.260003
1996,10.210005
1997,8.000002
1998,11.770004
1999,12.000002
2000,6.440001
2001,11.800005
2002,8.950003
2003,9.190002
2004,13.130003
2005,8.12
2006,9.699999
2007,12.3600025
2008,12.590004
2009,10.02
2010,9.490003
2011,10.100001
2012,9.379999
2013,17.320002
2014,9.010002
2015,9.060001
2016,10.120001
2017,11.3200035
2018,9.310001
2019,13.890002
2020,9.309999
2021,8.320001
2022,9.600003
2023,6.4900017
2024,15.060003
2025,8.970002
2026,11.120002