1963

7.1

1976

7.7

2018

6.8

2000

7.3

2004

6.7

1962

8.0

2001

7.1

2016

6.6

2008

7.5

2001

6.6

1997

6.4

2016

8.1

2003

6.7

2011

5.0

1979

6.2

1999

7.8

2006

7.9

2009

7.0

1994

4.7

2004

7.1