1976

4.8

2007

6.6

2011

7.4

2012

6.2

1994

7.1

2013

6.9

2020

6.0

1937

5.5

2003

6.6

2005

6.8

2011

5.5

2011

6.6

1971

7.0

1977

5.4

1966

5.6

1992

6.3

1997

6.9

1984

7.2

2022

7.2