1985

3.7

1986

7.0

2003

5.5

1995

5.8

1978

6.8

1976

4.7

2010

5.9

1981

6.5

1994

7.8

1991

3.9

1966

0.0

2007

8.7

1993

6.9

1967

5.8

1986

5.6

1990

2.7

1995

7.2