2021

0.0

1972

6.3

1990

5.9

1980

5.2

2006

5.3

1975

5.9

1995

4.0

1996

6.0

2019

5.8

2015

6.5

2019

5.9

1987

6.2

1991

6.7

1977

6.0

1995

6.7

1992

6.8

2001

6.0

2007

5.6

2017

4.0

2000

2.3