1986

7.6

2002

6.3

2001

7.8

1983

5.9

1999

7.0

2014

5.5

1999

5.4

1948

7.9

1996

7.4

1983

6.3

2009

5.9

2006

6.5

2005

5.7

2002

6.7

1996

7.2

1995

6.2

1984

6.4

1993

6.8

1985

7.1

2008

6.0