1969

3.0

2014

0.8

2004

3.9

1990

6.7

2000

5.8

1976

6.3

2009

4.5

1989

6.2

1974

7.1

1988

6.7

2003

6.6

2005

5.1

1997

7.7

2009

0.0

2020

5.3

2009

6.0

2007

5.4

2002

3.9

1968

5.0

1985

7.0