2002

7.7

2011

5.7

2020

6.5

2021

6.2

5.0

2017

6.1

1963

6.9

2009

5.6

2017

7.3

1940

6.6

1985

5.3

1953

4.8

2015

8.1

1976

5.9

7.1

2013

6.9