1982

7.3

2001

6.9

1965

6.9

2008

6.7

1978

6.2

1969

7.9

1949

7.1

2006

5.8

1991

6.4

1999

6.5

1976

6.6

1953

7.3

1994

8.7

1991

7.5

1989

7.2

2007

6.7

2014

7.5

1983

7.0

1967

6.5

2005

7.1