1981

7.6

2012

7.0

1939

5.0

2009

4.1

1950

6.5

2006

5.8

1983

4.5

2000

6.2

2015

5.9

6.5

2014

7.0

2019

6.0

2025

5.0

1958

6.3

1948

7.0

2015

5.0