1986

6.2

1988

5.5

1989

4.9

1993

4.6

2001

4.9

2018

6.0

2017

4.5

2003

6.1

1980

6.4

1981

6.2

1984

6.1

1985

5.3

1979

5.7

2014

4.5

2023

3.4

2016

10.0

1984

6.3

2010

3.3

2002

2.6

1989

5.5