1991

2.0

1992

2.0

1990

4.7

2006

0.0

2004

5.6

1987

7.3

1999

7.4

2003

5.8

1988

4.9

2003

7.1

1988

5.9

2019

1.0

1979

7.5

2018

3.3

2009

6.1

2000

6.0

2018

10.0

1976

5.9

1992

3.0

1972

5.6