2017

5.6

1974

7.0

2015

5.9

2005

6.7

2002

7.5

2004

7.3

2007

7.4

2006

6.6

2014

6.9

2007

6.1

1995

6.0

1991

3.5

2004

7.2

1963

7.1

1967

6.6

1974

6.4

1981

6.5

2019

5.3

1991

6.8

1993

7.0