1997

6.1

1988

0.0

2007

7.4

1995

7.3

1983

5.8

2005

6.5

2000

7.2

1981

0.0

1997

6.5

1983

5.9

1990

7.4

2001

7.6

1996

7.1

1997

8.0

1981

7.0

1995

6.4

1987

4.2

1999

5.7

2002

6.2

1988

5.8