Year | Value | 2023 | 47,789,049 | 2022 | 50,812,066 | 2021 | 53,832,965 | 2020 | 56,827,546 | 2019 | 59,233,752 | 2018 | 60,670,565 | 2017 | 60,851,124 | 2016 | 60,118,631 | 2015 | 59,320,067 | 2014 | 58,467,898 | 2013 | 58,229,613 | 2012 | 58,044,715 | 2011 | 55,085,218 | 2010 | 49,871,145 | 2009 | 44,812,114 | 2008 | 39,966,221 | 2007 | 37,156,948 | 2006 | 37,915,928 | 2005 | 40,385,703 | 2004 | 42,805,396 | 2003 | 44,113,133 | 2002 | 44,013,722 | 2001 | 43,298,516 | 2000 | 42,130,963 | 1999 | 40,253,322 | 1998 | 37,957,972 | 1997 | 35,208,471 | 1996 | 32,431,847 | 1995 | 29,938,011 | 1994 | 27,637,436 | 1993 | 25,793,298 | 1992 | 24,324,563 | 1991 | 23,308,677 | 1990 | 22,641,578 | 1989 | 22,162,748 | 1988 | 21,841,357 | 1987 | 21,689,100 | 1986 | 21,564,319 | 1985 | 21,538,797 | 1984 | 21,688,921 | 1983 | 21,850,675 | 1982 | 21,802,383 | 1981 | 21,489,045 | 1980 | 21,062,601 | 1979 | 20,588,309 | 1978 | 20,049,875 | 1977 | 19,555,031 | 1976 | 19,124,803 | 1975 | 18,727,888 | 1974 | 18,440,403 |
|