2012

9.1

2013

10.0

2021

6.3

2008

6.6

1995

7.2

1990

7.3

1994

5.8

1967

3.3

2007

6.1

1969

6.0

2002

6.9

2005

3.2

1979

6.0

1986

6.7

2004

6.6

1975

3.6

1938

7.1

1996

6.5

2016

6.3

2003

7.3