Year Number 1950 113.737 1951 115.157 1952 116.145 1953 117.025 1954 117.925 1955 118.82 1956 116.928 1957 115.753 1958 115.268 1959 115.324 1960 115.666 1961 116.825 1962 117.971 1963 119.048 1964 120.022 1965 120.894 1966 120.855 1967 120.631 1968 120.315 1969 120.027 1970 119.844 1971 118.557 1972 117.289 1973 115.878 1974 114.167 1975 112.146 1976 109.702 1977 106.875 1978 103.802 1979 100.748 1980 97.862 1981 94.711 1982 91.878 1983 89.203 1984 86.496 1985 83.79 1986 82.2 1987 80.894 1988 79.939 1989 79.362 1990 79.035 1991 76.867 1992 74.954 1993 73.182 1994 71.448 1995 69.747 1996 68.081 1997 66.422 1998 64.846 1999 63.453 2000 62.273 2001 60.734 2002 59.339 2003 58.054 2004 56.79 2005 55.529 2006 54.339 2007 53.202 2008 52.072 2009 50.938 2010 49.799 2011 49.102 2012 48.358 2013 47.647 2014 47.098 2015 46.759 2016 46.274 2017 46.022 2018 45.948 2019 45.93 2020 45.91 2021 45.95 2022 45.966 2023 46.011 2024 46.185 2025 46.536 2026 46.946 2027 47.509 2028 48.151 2029 48.747 2030 49.224 2031 49.53 2032 49.736 2033 49.878 2034 50.021 2035 50.21 2036 50.343 2037 50.492 2038 50.667 2039 50.888 2040 51.156 2041 51.422 2042 51.728 2043 52.082 2044 52.481 2045 52.922 2046 53.366 2047 53.848 2048 54.359 2049 54.889 2050 55.418 2051 55.896 2052 56.368 2053 56.855 2054 57.381 2055 57.946 2056 58.505 2057 59.111 2058 59.752 2059 60.426 2060 61.118 2061 61.779 2062 62.46 2063 63.164 2064 63.872 2065 64.556 2066 65.097 2067 65.607 2068 66.126 2069 66.705 2070 67.366 2071 67.992 2072 68.703 2073 69.492 2074 70.313 2075 71.11 2076 71.751 2077 72.387 2078 73.036 2079 73.708 2080 74.412 2081 74.977 2082 75.576 2083 76.203 2084 76.85 2085 77.504 2086 77.966 2087 78.44 2088 78.939 2089 79.46 2090 79.974 2091 80.284 2092 80.627 2093 80.998 2094 81.406 2095 81.825 2096 82.041 2097 82.283 2098 82.593 2099 82.953 2100 83.373