2000

6.5

1992

6.5

1981

6.5

1983

5.5

2001

8.5

2010

7.7

2008

6.8

1989

6.6

1983

7.9

2015

6.1

1977

8.2

1985

5.3

1999

6.3

2002

6.0

2002

6.9

1995

7.9

1997

5.4

2006

6.3

1987

6.3

1967

6.7