1979

4.8

1973

8.1

1974

4.7

2014

6.1

2021

7.1

2016

5.2

2005

5.5

2007

0.0

1980

5.9

1993

7.2

1984

7.2

1986

6.3

1989

5.9

1980

4.7

2015

6.5

1975

5.7