Year	Number
1961	485.6504468718967
1962	532.9382470119522
1963	586.3936063936064
1964	617.4348697394789
1965	657.4799196787149
1966	791.58953722334
1967	860.9595959595958
1968	899.1708796764408
1969	984.2408906882591
1970	1003.1306990881459
1971	989.1388044579534
1972	996.9300911854103
1973	1025.2487309644669
1974	1048.413021363174
1975	1060.8248472505093
1976	1119.4393476044852
1977	1125.5885363357215
1978	1129.824922760041
1979	1180.9251559251559
1980	1530.2230971128608
1981	1536.842105263158
1982	1543.5356200527706
1983	1545.4545454545455
1984	1541.994750656168
1985	1540.5759162303666
1986	1541.5032679738563
1987	1763.4730538922156
1988	1534.2503259452412
1989	1531.0169491525423
1990	1523.289817232376
1991	1534.671052631579
1992	1363.9423076923076
1993	1342.128418549346
1994	1167.9680851063831
1995	1250.8810068649886
1996	1233.341067285383
1997	1237.5172413793105
1998	1215.0057273768614
1999	1202.4169530355098
2000	1116.8329466357309
2001	1136.094674556213
2002	1153.8461538461538
2003	1149.5329341317365
2004	1136.8809523809525
2005	1127.0462633451957