1990

7.3

1989

5.7

2002

5.8

1965

6.9

1983

7.0

1969

8.0

1994

5.2

1961

7.5

2006

6.1

1997

6.2

2006

5.9

1993

7.6

2011

5.4

1986

5.6

1966

7.7

1990

5.9

1949

8.0

2011

7.3

1974

7.8

1943

8.0