1997

5.7

2011

10.0

2006

6.4

1998

7.0

1975

4.1

1975

4.5

1976

0.0

1975

3.8

2008

5.2

2003

5.8

1964

7.4

2002

6.0

1956

0.0

1989

6.5

1977

3.0

2005

0.0

1974

5.2

2001

5.0