Year	Number
1971	166107
1972	176658
1973	169324
1974	181911
1975	191692
1976	205910
1977	218376
1978	227815
1980	304962
1981	315145
1982	346703
1983	350160
1984	381674
1985	416024
1986	421689
1988	422210
1989	395389
1990	391152
1991	367426
2000	442915
2001	554308
2011	1194503
2012	1252343
2013	1299812
2015	1360243
2016	1412524
2017	1486939
2018	1369738
2019	1770368
2020	1759773
2021	1964346