1961-62

4.42 (9.30)

1962-63

4.49 (9.45)

1963-64

5.43 (11.42)

1964-65

5.66 (11.91)

1965-66

4.62 (6.79)

1966-67

7.79 (11.08)

1967-68

9.76 (13.88)

1968-69

11.15 (16.39)

1969-70

11.69 (17.00)

1970-71

10.94 (16.33)

1971-72

13.69 (17.96)

1972-73

21.44 (27.44)

1973-74

26.42 (34.39)

1974-75

36.11 (42.56)

1975-76

41.43 (50.46)

1976-77

66.41 (79.38)

1977-78

81.96 (99.52)

1978-79

99.37 (125.47)

1979-80

135.38 (173.72)

1980-81

159.24 (209.40)

1981-82

177.08 (206.20)

1982-83

172.37 (191.86)

1983-84

194.76 (188.35)

1984-85

245.42 (206.43)

1985-86

219.95 (179.77)

1986-87

283.60 (221.94)

1987-88

375.04 (289.25)

1988-89

451.28 (311.66)

1989-90

420.08 (252.30)

1990-91

565.34 (282.61)

1991-92

847.61 (304.41)

1992-93

1047.93 (381.99)

1993-94

992.00 (316.13)

1994-95

1102.94 (351.02)

1995-96

1364.92 (408.07)

1996-97

1584.79 (446.41)

1997-98

1661.58 (447.07)

1998-99

2013.94 (478.68)

1999-2000

2136.03 (492.93)

2000-01

2315.15 (512.03)

2001-02

2436.13 (514.07)

2002-03

2590.26 (532.96)

2003-04

2779.79 (614.44)

2004-05

2583.62 (591.62)

2005-06

3082.06 (696.53)

2006-07

3674.86 (807.94)

2007-08

3524.73 (875.71)

2008-09

2708.73 (600.06)