1980

0.0

2002

6.8

1999

0.0

2000

6.0

1986

8.3

1999

6.8

1998

7.0

2006

7.4

1954

5.5

1980

5.0

1993

5.5

1998

7.0

1965

6.1

1984

6.6

1975

6.9

1997

7.3

1977

5.8

1996

5.7

1990

6.9

2005

8.1