2009

8.5

1999

7.0

2011

7.2

1997

4.9

2010

8.0

2020

6.0

2018

5.0

1982

5.8

2010

7.1

1967

6.5

2021

7.7

1978

3.4

1969

6.3

1976

3.7

1972

4.0

1946

6.3

1985

5.6

2014

6.5