1970

7.3

2001

7.5

2004

7.1

1980

7.7

2011

6.7

2002

5.2

2016

7.6

2017

8.5

1951

8.0

2005

0.0

2021

6.7

2004

6.5

1998

6.8

2016

0.0

1977

9.0

2015

7.0

2003

5.8

1964

6.2

1996

1.0

1959

6.1