Year | Value | 2009 | 563,632 | 2008 | 612,644 | 2007 | 602,996 | 2006 | 568,864 | 2005 | 586,458 | 2004 | 564,149 | 2003 | 463,884 | 2002 | 525,049 | 2001 | 558,563 | 2000 | 642,027 | 1999 | 593,400 | 1998 | 556,700 | 1997 | 544,000 | 1996 | 504,000 | 1995 | 476,700 | 1994 | 499,300 | 1993 | 502,900 | 1992 | 430,000 | 1991 | 318,300 | 1990 | 318,300 | 1989 | 313,100 | 1988 | 385,600 | 1987 | 351,300 | 1986 | 340,800 | 1985 | 328,500 | 1984 | 338,100 | 1983 | 310,400 | 1982 | 356,500 | 1981 | 412,600 | 1980 | 477,600 | 1979 | 456,100 | 1978 | 259,700 | 1977 | 292,900 | 1976 | 326,900 | 1975 | 333,600 | 1974 | 346,200 | 1973 | 137,700 | 1972 | 136,000 | 1971 | 221,300 | 1970 | 219,300 |
|