1965

6.8

1964

4.6

1975

6.7

1990

6.1

1990

4.9

1980

5.2

2009

6.2

1974

5.7

2004

0.0

1989

5.3

1950

6.4

1980

5.8

1962

5.6

1984

6.4

1991

7.3

1984

5.9

1977

4.5

1999

6.7

1991

6.4

2004

5.5