1982

4.0

2001

6.5

2001

7.2

2002

6.0

2004

8.6

1985

5.8

1995

7.3

2004

6.5

1986

2.7

2008

6.9

1975

5.0

1987

8.4

1991

6.0

1999

8.3

1981

7.2

1996

2.7

2002

7.3