1988

4.5

2006

5.8

2017

4.9

2008

6.0

2003

5.1

1986

6.1

2002

6.4

1995

7.0

2019

4.9

2013

7.9

2014

6.5

1990

5.8

1991

5.3

2013

5.1

2006

6.4

2000

4.0

2008

7.3

2014

3.7

2002

6.7

2022

5.7