1964

7.4

1951

6.3

2013

6.2

1996

4.5

1994

1.0

2004

5.7

2009

6.9

2000

5.6

1949

5.7

1992

0.0

1960

3.0

1956

6.1

1990

6.5

1975

0.0

1997

7.6

2010

2.5

1947

1.0

2007

5.4

2005

6.7

2005

7.8