1968

7.4

1994

5.4

1988

6.7

1995

7.3

1965

8.0

1969

7.6

1966

8.5

2005

7.0

1958

7.6

1974

7.5

1965

5.8

1990

6.5

1969

7.4

1977

6.6

1953

6.9

2015

7.8

1968

7.7

1959

6.6

1971

6.2

1958

6.0