1993

8.1

1993

2.0

1967

7.6

1987

6.5

2003

6.4

2004

7.1

2006

6.9

1994

7.4

1996

5.4

2016

8.0

1991

8.3

2007

0.0

1990

6.7

2017

8.5

2007

7.1

1999

6.1

1954

6.0

1966

7.6

1997

6.2

2009

6.0