1927

6.0

1974

4.5

2006

4.1

2019

3.9

1992

7.1

1997

8.3

1985

7.0

10.0

1987

6.5

2002

6.7

2002

7.0

2005

6.2

1937

5.3

1962

7.9

1991

4.8

2008

7.4

2014

3.0

1926

5.0

1985

7.2

1997

7.5