2001

3.0

1975

5.1

1977

5.7

1991

5.9

1978

4.9

2018

6.6

1985

5.1

2019

5.0

2018

4.6

1965

6.9

2012

2.5

2014

5.9

1971

3.5

1981

7.8

2021

7.8

2020

0.0

1989

7.2

2007

6.5

1984

6.9

2003

6.8