2008

6.1

2009

6.5

2017

6.0

1990

6.0

2003

5.3

2000

5.7

2001

5.9

1977

6.3

2007

7.8

2007

6.3

1997

6.5

2005

6.7

1964

7.5

2007

6.6

2022

6.0

1980

6.6

1968

7.3

1962

7.2

1970

7.1

1979

7.0