2001

6.2

2023

4.8

2005

6.0

2006

6.8

1992

6.6

2021

7.6

2007

5.6

1961

7.7

1976

7.8

1979

7.3

1982

6.9

1985

7.1

1990

5.8

2005

7.6

2017

5.3

1987

6.4

2019

7.2

2019

4.0

2000

6.6

1974

6.7