2006

7.4

2013

4.8

1934

7.5

2002

5.3

1987

7.3

1989

7.0

2001

5.9

2006

6.0

2007

7.6

1989

6.3

2016

4.2

1998

5.4

2017

2.0

2008

6.4

1950

6.8

1943

7.5

1984

6.2

1992

5.9

1988

6.2

1977

6.1