2013

7.1

1991

8.7

1986

6.9

1977

7.3

2016

6.3

1982

7.1

1986

7.6

1995

5.6

1970

6.7

2000

5.1

2019

4.6

2010

7.7

2019

5.7

2018

5.7

2013

6.0

2005

4.9

2016

6.5

2014

7.1

2017

5.8

2015

7.1