1978

5.8

2014

5.4

1990

7.0

2002

3.3

2004

4.0

1999

7.3

2017

6.7

1992

3.3

1974

2.8

1993

3.8

1987

4.5

2019

6.8

1997

0.0

2015

6.5

2016

6.0

2002

6.0

1965

6.6

1955

0.0

2014

9.0

1988

7.4