2005

6.3

1983

4.0

2006

7.5

2016

5.6

1962

7.3

2007

6.3

1995

7.0

1972

2.4

1986

6.6

1974

6.8

1999

3.2

2001

6.4

1970

3.8

1978

6.6

1980

5.4

2006

1.0

1998

7.5

2003

6.6

1954

6.3

2015

4.6