Year	Number
1970	4686463
1973	3081440
1976	2604138
1977	3200682
1978	3334255
1981	3880629
1983	4378354
1984	4706786
1985	5101058
1986	5396551
1987	5688607
1988	4360633
1989	4451076
1990	4085120
2005	792416
2006	719981
2008	1233122
2009	1080983
2010	841508