2016

4.5

2013

8.5

1998

8.2

1977

6.8

1990

6.2

1993

7.1

1983

6.7

1991

6.3

1979

6.7

2007

5.6

1986

6.1

1989

4.7

1991

10.0

2003

7.1

1998

7.7

2000

4.9

2014

5.5

1994

5.3

1990

5.2

2010

2.1

2013

10.0

2007

8.1

2008

7.6