2002

6.2

2004

5.4

2004

3.5

1992

5.0

1998

5.8

1977

3.8

2017

6.7

2008

6.8

1989

6.0

2011

5.1

1991

5.5

2015

4.4

2009

5.3

1960

5.0

1961

7.0