2007

6.5

2006

6.1

1982

7.5

1981

7.1

1976

7.3

2021

6.3

2011

5.7

1987

6.6

1972

6.4

1986

6.8

2010

7.8

2023

8.3

2008

5.2

1973

6.2

2001

6.4

2009

5.7

1964

7.0

1959

6.9

2005

7.2

2002

6.0