2003

6.7

1993

6.2

1973

6.5

1999

8.4

1959

8.0

1998

7.3

2004

6.7

1994

8.5

2013

7.5

2000

6.3

2000

8.0

1998

7.5

2004

7.4

2011

6.9

2011

7.4

1989

7.8

2014

6.9

2008

5.2

1996

7.6

1988

7.9