1999

5.8

1975

6.4

2022

6.8

2003

5.7

2005

5.9

2008

4.5

1989

6.2

1984

6.1

1977

6.4

1994

7.5

1991

6.3

2014

7.5

2000

8.1

2010

5.5

1975

7.3

1972

7.5

1987

5.1

1950

6.8

2016

6.0

1966

6.5