Year	Number
1971	76461
1972	87284
1973	99970
1974	111038
1975	126654
1976	143812
1977	163810
1978	183179
1979	198616
1980	212860
1981	234090
1982	248786
1983	273660
1984	296538
1985	328423
1986	343720
1987	386867
1988	416764
1989	439365
1990	457161
1991	500272
1992	534451
1994	550480
1995	550648
1997	549569
1998	587611
1999	642781
2000	699669
2001	848276
2002	759804
2003	823068
2004	751580
2005	784203
2006	698444
2007	976910
2008	1127691
2009	1268655
2010	1389487
2011	1574451
2012	1713452
2013	1812849
2014	2000076
2015	2108279
2016	2206878
2017	1907644
2018	1804598
2019	1778385
2020	1868982
2021	1918924
2022	1983379