2021

3.2

2020

3.5

2019

4.5

2003

0.0

2005

6.3

2003

2.8

2007

6.6

2005

3.7

2002

5.3

1983

5.2

1972

3.0

2017

1.5

2015

7.5

2002

5.1

2005

4.9

1988

6.3

1999

6.0

1973

4.7

1969

4.0

1985

5.0