Year	Total
1990	1595000
1991	1967000
1992	2500000
1993	3050000
1994	3875000
1995	4857000
1996	6304000
1997	6931000
1998	8269000
1999	11530000
2000	18620000
2001	22500000
2002	23500000
2003	24250000
2004	24860000
2005	25680000
2006	26120000