2002

5.2

2006

5.2

1970

4.1

1988

5.4

1970

4.2

1971

4.4

1968

4.9

1970

5.7

1989

4.5

1985

3.8

2007

5.8

2012

2.3

1980

2.0

1974

1.5

1981

0.0

1979

6.0

1975

5.4

2000

3.6

1973

6.4

2016

2.0