1982

4.5

1970

7.3

2001

7.5

1964

6.2

1995

6.9

2004

7.1

1980

7.7

2002

5.2

2003

5.8

1998

6.8

2011

6.7

2016

7.6

1959

6.1

2017

8.5

2017

0.0

1997

0.0

1951

8.0

2014

9.0

2009

0.0

2021

0.0