1939

5.9

1999

8.0

2000

5.2

2002

7.1

2017

7.4

1998

7.5

1990

6.1

2005

6.3

1980

6.7

1972

6.4

1994

5.7

1991

5.7

1982

5.7

2002

5.4

2013

5.2

2009

4.7

2006

6.1

2003

5.7

1962

7.6

2008

5.7