Year	Number
1971	1917813
1984	866822
1985	897726
1986	907748
1987	942069
1988	886265
1989	901053
1990	466108
1992	406293
1997	345035
1999	1038969
2000	1084220
2002	195308
2003	155952
2004	134737
2005	101437
2007	24180
2009	23173
2010	14636
2011	17049
2012	19737
2014	33643
2015	37795
2016	118211
2017	66293
2019	77561
2020	167070