2016

5.4

2016

4.0

1975

5.6

1999

6.4

1980

7.5

2005

6.3

2002

6.8

2006

6.3

2011

3.3

2013

6.7

1987

2.0

1990

6.8

1983

5.4

1969

3.0

1999

4.5

1980

6.6

1991

6.7

1986

5.5

1984

1.0

2009

4.3