Year	Number
1971	105520
1972	99270
1973	115319
1974	130637
1975	143343
1976	141257
1977	136949
1978	134646
1979	122185
1980	51502
1981	49022
1982	57693
1983	67803
1984	91346
1985	206591
1986	235456
1987	199406
1988	180892
1989	172463
1990	155298
1991	159765
1992	161865
1998	405
1999	3484
2000	2356
2001	2110
2002	1182
2003	1895
2004	26161
2005	3863
2006	45293
2007	101431
2008	16675
2009	31532
2010	23356
2011	45981
2012	80776
2013	82755
2014	80363
2015	86811
2016	102263
2017	107102
2018	116634
2019	122703
2020	150458
2021	1026
2022	152626