1946

7.6

1968

7.2

1995

7.9

1979

7.2

1986

7.6

1955

7.9

1978

6.0

1973

7.2

1990

5.9

1947

6.6

1972

5.7

2016

6.4

1991

5.6

2011

4.7

2005

7.0

2009

5.8

1953

5.4

2002

6.2

1987

6.8

1975

7.2