1984

6.5

1989

5.8

6.8

1993

6.9

1988

5.8

1970

7.7

1990

4.4

1989

7.9

2021

6.0

2019

5.7

2020

7.4

2010

6.6

2011

7.0

2016

6.7

2007

8.2

2022

6.1

2009

4.6

2001

6.9

2020

6.5

2019

5.4