1973

4.7

2016

4.4

1969

4.0

1985

5.0

1997

5.8

1982

5.9

1972

3.0

1983

5.2

1999

6.0

2017

1.5

2007

6.6

2002

5.1

2005

3.7

2002

5.3

2015

7.5

2019

4.5

2021

3.2

2005

4.9

2003

2.8

2003

0.0