2004

7.0

2001

6.1

1959

6.3

1976

5.9

2008

8.1

1976

6.6

1979

5.8

2001

7.1

1986

7.4

1991

5.2

2011

5.9

2015

7.6

1995

5.5

2004

5.7

2005

6.5

2018

6.3

1992

6.4

1997

6.2

2009

6.2

2002

7.6