1998

5.9

2006

7.7

2005

7.0

1982

8.9

2005

5.3

1990

6.2

2001

5.4

1989

6.9

1940

6.5

2014

0.0

2017

6.0

2018

6.9

2002

7.8

1977

7.0

2007

5.0

2005

6.8

1993

7.4

1992

7.1

2001

6.0

1980

5.6