1969

3.8

1986

4.5

1973

6.4

2010

4.8

1962

0.0

2017

4.3

2017

1.0

2003

5.7

1991

4.0

2003

0.0

1979

6.0

1981

5.0

1988

6.2

2014

6.7

2002

4.0

1986

6.1

1997

5.2

1976

2.8

2008

4.6

1982

6.0