1932

6.1

2003

6.7

1997

6.4

2001

7.5

2005

5.9

2005

6.3

2009

5.9

1995

6.3

1998

5.5

2007

2.0

1990

6.7

2002

6.6

1996

6.5

2013

5.5

2004

6.5

1994

5.8

1997

6.6

1984

5.0

1977

6.3

1980

6.0