1998

7.7

1989

5.7

2009

6.0

1979

10.0

2006

5.9

1997

7.4

2014

7.0

2019

6.1

2004

6.8

2006

6.6

2010

7.6

1982

7.1

6.8

1952

7.4

2011

7.5

2001

7.2

1999

4.9

1961

7.5

2006

6.5