2004

6.4

2015

5.2

1980

8.2

1999

6.9

1994

8.7

2019

8.1

1979

7.6

1987

7.3

1989

7.2

2017

7.2

2004

8.1

2009

7.3

1990

7.4

2005

7.1

2004

7.2

2017

7.6

2012

6.6

2016

7.5

2014

7.9

1987

7.3