2016

7.2

2014

4.6

1995

7.6

2013

3.1

1930

3.3

1962

7.7

1991

7.1

2003

7.2

2005

7.3

1988

2.2

1976

6.6

2007

3.0

1967

6.3

2001

7.6

2004

7.0

1992

7.4

2008

7.4

1925

6.8

2004

1.0

1995

6.5