2009

2.7

1995

1.0

2015

4.1

1975

0.0

1995

5.3

1971

4.5

1976

0.0

1974

3.8

1971

6.0

1990

3.5

1979

6.0

1977

3.4

1986

4.9

1981

3.7

2007

5.0

1989

3.7

1990

5.4

1998

4.1

2012

4.7

2021

2.0