1999

7.3

1997

0.0

1998

6.0

2002

6.0

2006

5.3

2004

5.5

2017

6.7

1985

7.4

1985

4.1

2019

5.8

1988

6.6

1993

3.5

2016

5.9

1955

0.0

2006

6.2

1987

4.5

2005

5.1

1968

6.2

2019

6.0

1975

0.0