1995

7.4

1988

5.8

2005

6.8

2001

6.7

1984

6.7

2000

0.0

2008

5.6

1977

5.6

1986

6.7

1982

6.2

1983

6.7

1984

7.2

1991

7.1

1993

6.5

1961

7.6

2019

6.7

1942

7.1

1955

7.9

1946

7.6

1952

5.3