1950

8.1

2008

5.5

1976

4.9

2014

9.1

1985

5.6

2017

6.8

1899

5.7

2014

4.9

1968

6.0

2021

7.9

1968

5.6

1988

6.1

2000

6.1

2007

5.7

1968

4.4

2016

7.8

2004

6.7

1995

6.4

2016

7.0

2004

6.2