1998

4.7

2003

6.0

1998

6.8

2006

6.9

2004

5.7

2001

6.2

1993

6.2

1954

8.0

1971

6.4

1977

6.8

2016

7.3

2005

6.7

1986

7.6

2006

5.6

1995

8.4

1979

6.9

2016

5.6

2017

6.8

1949

0.0

2010

0.0