2001

0.0

1983

0.0

2000

7.6

2004

7.9

1994

7.8

2007

5.7

2013

6.0

1979

6.8

1998

5.4

1992

5.9

2013

3.7

1991

7.2

2003

7.2

1993

3.7

2000

7.1

1989

8.0

1999

8.0

0.0

1997

7.7

2010

2.9