2018

6.8

1996

6.6

1996

8.0

1997

8.4

2000

8.0

2002

7.2

2014

7.4

1966

7.3

1999

7.2

1985

6.2

2009

6.4

1995

4.0

1979

6.4

2005

2.9

1984

6.5

2014

6.8

2009

3.2

1969

3.9

2004

7.1

2017

7.2