2008

6.8

2015

6.2

2014

4.6

2001

6.4

1987

7.4

2013

5.5

2004

9.9

2002

5.4

1993

6.6

2010

5.6

1995

7.7

1998

4.4

1987

6.9

1920

7.9

1940

8.3

1994

7.9

2017

7.3

1999

6.6

1956

7.3

1991

5.3