2005

6.2

1975

6.9

0.0

2003

8.2

2001

7.2

1980

7.5

2018

5.1

1976

6.5

1985

6.3

1962

6.5

1947

5.3

2014

6.6

1916

0.0

1991

6.4

1984

6.4

1991

7.4

1970

6.7

1984

4.7

1989

5.3

1950

6.4