1980

6.7

2007

4.0

2002

6.3

1982

6.4

1999

5.4

2014

4.5

2022

7.4

1997

6.0

1975

7.2

2004

6.1

1981

6.5

2004

5.6

1984

6.9

1955

7.0

1977

7.2

1996

6.5

1990

6.8

2003

8.1

1992

6.1

2010

6.8