1961

5.7

1969

5.6

2023

10.0

2009

6.6

2010

6.3

2009

6.1

2009

4.1

2008

5.9

2009

7.0

1990

6.2

1998

6.4

1995

5.8

1979

6.7

2006

7.6

1993

6.7

1976

6.6

2003

6.3

1953

6.8

1994

6.4

1995

5.8