1988

3.5

2002

6.9

2015

7.2

2014

5.4

1971

6.1

1989

9.3

2008

7.6

2002

10.0

1995

6.6

2014

6.8

2016

6.6

1999

7.3

1974

5.9

1999

9.1

2004

9.5

1994

7.4

1993

5.8

1998

7.3

2019

7.7

2012

6.3