2005

6.7

1999

7.0

1957

4.4

2000

7.3

2002

6.9

2004

6.4

1970

7.2

2006

5.8

2004

5.6

1967

5.9

2013

5.5

2016

5.3

1976

3.0

2002

7.4

2001

6.4

2014

4.2

2001

5.7

1934

7.0

2014

5.5

1996

7.0