Year Number 1950 66.358 1951 66.672 1952 67.236 1953 68.007 1954 68.964 1955 70.099 1956 72.585 1957 75.4 1958 78.486 1959 81.838 1960 85.412 1961 87.816 1962 90.123 1963 92.141 1964 93.907 1965 95.675 1966 98.646 1967 102.007 1968 105.444 1969 108.552 1970 111.012 1971 111.009 1972 110.289 1973 108.853 1974 106.817 1975 104.351 1976 99.964 1977 96.155 1978 93.031 1979 90.612 1980 88.747 1981 86.816 1982 85.067 1983 83.363 1984 81.552 1985 79.589 1986 78.34 1987 76.929 1988 75.57 1989 74.558 1990 73.998 1991 72.937 1992 72.213 1993 71.701 1994 71.135 1995 70.413 1996 69.814 1997 69.246 1998 68.716 1999 68.237 2000 67.762 2001 66.857 2002 65.808 2003 64.678 2004 63.563 2005 62.498 2006 60.999 2007 59.624 2008 58.24 2009 56.725 2010 55.095 2011 53.762 2012 52.27 2013 50.764 2014 49.497 2015 48.626 2016 47.995 2017 47.905 2018 48.188 2019 48.551 2020 48.825 2021 49.366 2022 49.636 2023 49.802 2024 50.13 2025 50.726 2026 51.043 2027 51.716 2028 52.563 2029 53.296 2030 53.771 2031 54.031 2032 54.065 2033 53.946 2034 53.84 2035 53.841 2036 53.778 2037 53.811 2038 53.932 2039 54.099 2040 54.288 2041 54.389 2042 54.539 2043 54.767 2044 55.113 2045 55.599 2046 56.078 2047 56.692 2048 57.444 2049 58.33 2050 59.34 2051 60.315 2052 61.428 2053 62.658 2054 63.971 2055 65.34 2056 66.588 2057 67.89 2058 69.246 2059 70.662 2060 72.133 2061 73.442 2062 74.828 2063 76.222 2064 77.514 2065 78.629 2066 79.315 2067 79.832 2068 80.228 2069 80.599 2070 81.01 2071 81.16 2072 81.382 2073 81.655 2074 81.919 2075 82.135 2076 81.985 2077 81.813 2078 81.727 2079 81.891 2080 82.403 2081 82.944 2082 83.892 2083 85.132 2084 86.454 2085 87.71 2086 88.601 2087 89.471 2088 90.325 2089 91.171 2090 91.994 2091 92.465 2092 92.958 2093 93.436 2094 93.879 2095 94.293 2096 94.371 2097 94.436 2098 94.516 2099 94.669 2100 94.924