1982

5.2

1950

8.1

2004

7.9

1977

7.1

1997

8.4

2015

7.8

2005

7.1

1969

6.0

2014

0.0

2001

6.9

2006

6.7

2006

4.9

1996

6.2

1970

7.5

2005

7.7

1970

0.0

1982

7.6

1966

7.2

1961

8.0

1957

7.8