1975

5.5

1994

6.8

1994

6.9

1997

7.4

1958

0.0

1991

7.5

1969

5.2

1990

7.4

1971

10.0

1973

6.6

2000

4.2

1997

6.0

1986

6.1

1983

7.0

1990

0.0