Year | Value | 2022 | 28,741,550 | 2021 | 28,821,030 | 2020 | 28,957,843 | 2019 | 29,090,818 | 2018 | 29,408,951 | 2017 | 29,426,940 | 2016 | 29,433,527 | 2015 | 29,452,171 | 2014 | 29,460,113 | 2013 | 29,177,490 | 2012 | 28,823,419 | 2011 | 28,735,593 | 2010 | 28,692,324 | 2009 | 28,614,327 | 2008 | 28,490,726 | 2007 | 28,309,208 | 2006 | 28,171,789 | 2005 | 28,085,940 | 2004 | 27,937,545 | 2003 | 27,742,139 | 2002 | 27,608,392 | 2001 | 27,563,815 | 2000 | 27,550,271 | 1999 | 27,542,538 | 1998 | 27,545,248 | 1997 | 27,544,913 | 1996 | 27,537,434 | 1995 | 27,537,757 | 1994 | 27,546,249 | 1993 | 27,548,717 | 1992 | 27,538,491 | 1991 | 27,527,215 | 1990 | 27,515,574 | 1989 | 27,499,059 | 1988 | 27,484,491 | 1987 | 27,477,010 | 1986 | 27,480,185 | 1985 | 27,484,648 | 1984 | 27,483,440 | 1983 | 27,483,892 | 1982 | 27,480,589 | 1981 | 27,469,197 | 1980 | 27,409,982 | 1979 | 27,328,394 | 1978 | 27,262,224 | 1977 | 27,177,189 | 1976 | 27,072,044 | 1975 | 26,945,508 | 1974 | 26,791,418 | 1973 | 26,621,405 | 1972 | 26,445,677 | 1971 | 26,294,708 | 1970 | 26,164,656 | 1969 | 26,019,665 | 1968 | 25,865,943 | 1967 | 25,694,120 | 1966 | 25,499,641 | 1965 | 25,292,400 | 1964 | 25,069,667 | 1963 | 24,854,559 | 1962 | 24,665,521 | 1961 | 24,498,760 | 1960 | 24,345,052 |
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