2014

4.6

1998

1.0

1990

6.0

2012

9.1

1992

6.8

2000

7.4

2008

5.3

1970

7.2

2009

6.1

1976

7.0

1948

7.3

1953

6.8

2003

3.7

2008

5.5

1985

5.9

2001

6.0

1986

5.5

1993

6.3

1995

6.4

1993

6.0