1973

6.9

1963

7.1

1967

6.6

1974

6.4

1981

6.5

1996

7.7

2007

6.1

1995

6.0

2021

6.6

1994

8.3

2001

7.8

1991

7.3

2006

7.5

1997

5.8

2003

7.2

2006

6.6

2017

5.2

1993

6.3

1994

5.7

2022

5.4