1999

7.9

2007

7.6

2013

6.9

1996

7.9

1975

7.0

1985

6.7

2001

5.9

2008

3.5

1986

5.5

1995

7.1

2002

7.9

2022

7.3

1967

6.7

2007

7.5

1969

7.0

1999

9.5

2006

6.9

2000

8.5

1998

0.0

1984

6.5