2017

4.9

2011

7.1

1993

6.6

1979

8.1

1999

7.6

2009

5.8

2009

5.0

2001

6.8

1998

6.6

1996

5.7

1995

5.9

1970

6.8

2009

7.3

1982

7.5

2008

7.5

1982

5.2

1991

6.4

2003

8.5

1944

7.5

1988

6.5