2019

6.2

2017

6.8

2018

0.0

2014

6.0

2004

7.1

2006

6.6

1973

7.1

2005

6.6

1991

5.8

2005

7.0

1971

7.0

1997

6.7

2007

7.5

1965

7.8

1992

6.7

2017

7.2

1986

7.4

1985

5.0

1960

6.4

2011

6.3