2003

3.5

1996

5.5

2007

4.6

1973

10.0

1973

10.0

2009

4.7

1982

5.2

1973

5.1

1970

0.0

1990

4.9

1971

5.0

2002

3.4

1983

5.0

1985

2.0

1983

5.2

1986

2.0

2016

4.3

1965

4.8

1978

4.4

2017

4.7