1983

7.4

2002

6.2

2002

6.7

1969

6.3

1984

5.6

2015

7.5

2016

7.5

2002

6.0

2007

8.1

2005

5.9

2007

7.1

1998

6.6

2006

5.8

2005

6.2

2007

6.1

2009

7.1

2017

5.4

1995

6.2

1970

6.8

2002

6.3