1996

6.1

1998

7.2

1989

7.2

1987

6.4

1990

7.3

1980

6.3

1950

7.7

2014

3.0

2019

10.0

1973

5.9

1947

6.7

1962

7.2

1931

0.0

1989

6.2

2007

2.0

1967

0.0

1960

6.2

1991

6.9

1968

7.4

1943

6.9