1980

5.9

1987

6.3

1985

6.7

1981

6.2

2002

5.5

1987

6.2

2000

5.8

1996

7.0

2000

6.1

2014

6.1

2001

6.8

1976

7.2

1985

5.7

2002

4.3

1985

6.2

2022

6.0

1997

6.4

2003

6.3

1999

6.4

1974

6.2