2002-03
2001-00
2000-01
1999-00
1998-99
1997-98
1996-97
1995-96
1994-95
1993-94
1992-93
1991-92
1990-91
1989-90
1988-89
1987-88
1986-87
1985-86
1984-85
1983-84
1982-83
1981-82
1980-81
1979-80
1978-79

46
20
37
24
34
37
28
33
47
55
69
50
45
33
38
39
32
45
38
45
36
28
20
16
11

21,112
20,772
20,551
20,167
19,984
19,581
19,301
18,938
18,558
17,974
17,648
17,407
16,334
15,876
15,451
14,942
14,533
14,312
14,096
13,536
13,300
12,700
12,300
11,900
11,600

0.2
0.1
0.2
0.1
0.2
0.2
0.1
0.2
0.3
0.3
0.4
0.3
0.3
0.2
0.2
0.3
0.2
0.3
0.3
0.3
0.3
0.2
0.2
0.1
0.1