1978

5.1

2005

6.8

1972

6.6

1981

5.0

1995

5.8

2015

5.8

1972

4.9

1970

5.3

1960

3.1

1975

4.6

2019

7.0

1970

5.7

2025

0.0

2013

4.1

1932

7.3

1998

6.8

2001

7.8

2004

7.3

2007

6.3

1992

7.7