2006

6.2

1999

6.8

1962

7.3

2006

6.0

2006

6.3

1997

6.5

1993

5.0

1996

6.9

1975

5.8

2015

5.6

2004

6.1

1983

5.4

2003

5.1

1992

7.1

2001

4.9

1969

3.0

2006

5.3

1985

6.1

1999

6.0

1984

8.8