_id jaar meting trendlijn 1 1892 0 2 1893 0 3 1894 0 4 1895 0 5 1896 0 6 1897 0 0.105 7 1898 0 0.211 8 1899 0 0.316 9 1900 0 0.422 10 1901 0 0.527 11 1902 0 0.632 12 1903 0 0.737 13 1904 0 0.842 14 1905 0 0.947 15 1906 0 1.052 16 1907 0 1.157 17 1908 0 1.262 18 1909 0 1.367 19 1910 0 1.473 20 1911 23 1.578 21 1912 0 1.685 22 1913 0 1.792 23 1914 0 1.899 24 1915 0 2.007 25 1916 0 2.115 26 1917 0 2.224 27 1918 0 2.334 28 1919 0 2.444 29 1920 0 2.555 30 1921 12 2.667 31 1922 5 2.78 32 1923 10 2.894 33 1924 0 3.009 34 1925 0 3.124 35 1926 0 3.24 36 1927 0 3.348 37 1928 0 3.45 38 1929 8 3.543 39 1930 6 3.628 40 1931 0 3.702 41 1932 13 3.767 42 1933 0 3.82 43 1934 0 3.863 44 1935 0 3.894 45 1936 6 3.914 46 1937 0 3.924 47 1938 11 3.924 48 1939 0 3.914 49 1940 0 3.897 50 1941 8 3.871 51 1942 6 3.838 52 1943 0 3.797 53 1944 10 3.751 54 1945 0 3.699 55 1946 0 3.646 56 1947 45 3.592 57 1948 8 3.54 58 1949 0 3.489 59 1950 0 3.44 60 1951 0 3.393 61 1952 6 3.346 62 1953 0 3.3 63 1954 0 3.253 64 1955 0 3.203 65 1956 0 3.15 66 1957 11 3.091 67 1958 0 3.027 68 1959 5 2.959 69 1960 0 2.887 70 1961 0 2.812 71 1962 0 2.733 72 1963 0 2.652 73 1964 0 2.569 74 1965 0 2.487 75 1966 0 2.408 76 1967 0 2.335 77 1968 0 2.271 78 1969 0 2.216 79 1970 0 2.173 80 1971 0 2.14 81 1972 0 2.12 82 1973 0 2.112 83 1974 0 2.12 84 1975 12 2.144 85 1976 17 2.185 86 1977 0 2.242 87 1978 0 2.314 88 1979 0 2.398 89 1980 0 2.489 90 1981 0 2.583 91 1982 0 2.678 92 1983 9 2.773 93 1984 0 2.866 94 1985 0 2.958 95 1986 0 3.048 96 1987 0 3.138 97 1988 0 3.229 98 1989 0 3.325 99 1990 11 3.424 100 1991 0 3.528 101 1992 0 3.636 102 1993 0 3.764 103 1994 9 3.906 104 1995 16 4.057 105 1996 0 4.212 106 1997 17 4.37 107 1998 6 4.53 108 1999 0 4.69 109 2000 0 4.851 110 2001 0 5.012 111 2002 0 5.172 112 2003 13 5.333 113 2004 0 5.493 114 2005 8 5.653 115 2006 21 5.813 116 2007 0 5.973 117 2008 0 6.133 118 2009 0 6.292 119 2010 8 6.452 120 2011 0 6.611 121 2012 0 6.77 122 2013 7 6.929 123 2014 0 7.089 124 2015 6 7.249 125 2016 5 7.409 126 2017 5 7.571 127 2018 25 7.733 128 2019 19 7.896 129 2020 12 8.061 130 2021 0 8.227 131 2022 8 8.394 132 2023 18 8.561 133 2024 0 8.73 134 2025 11 8.9