2009

7.2

1999

6.0

2001

5.9

2003

5.7

1988

7.3

1977

6.8

1981

0.0

2015

7.1

2020

0.0

2002

5.8

2006

6.6

1930

5.6

1988

6.3

2008

5.7

1997

6.6

1977

6.0

2000

5.1

1986

6.7

2002

4.4

1994

6.7