1986

7.0

1979

4.6

1985

5.7

1983

5.8

2011

8.0

1983

6.2

1996

5.0

2010

6.6

1993

6.3

1982

6.5

2014

6.4

1973

8.2

1976

7.1

2004

5.5

1986

7.0