1981 : 3200 products
1982 : 12480 products
1983 : 16022 products
1984 : 16122 products
1985 : 15842 products
1986 : 16244 products
1987 : 16732 products
1988 : 15358 products
1989 : 15957 products
1990 : 27986 products
1991 : 21261 products
1992 : 17007 products
1993 : 16826 products
1994 : 17013 products
1995 : 16989 products
1996 : 17152 products
1997 : 19009 products
1998 : 17540 products
1999 : 16941 products
2000 : 17053 products
2001 : 17222 products
2002 : 17209 products
2003 : 17159 products
2004 : 17235 products
2005 : 17019 products
2006 : 9295 products