Year	Number
1971	100582
1973	103350
1980	102229
1982	113070
1983	115866
1984	122911
1985	117400
1986	123604
1987	120764
1988	124296
1989	133033
1990	125317
1991	117100
1992	108354
1993	106868
1994	104529
1995	113315
1999	75780
2000	63065
2001	45118
2002	14271
2006	10232
2007	11470
2010	10868