1996

7.0

2017

6.6

2018

0.0

1999

7.3

1997

7.5

2006

5.0

1978

7.3

1993

8.2

1969

8.3

1980

7.8

1999

7.6

1985

6.3

1965

7.5

2001

5.6

2009

8.0

2004

10.0

1988

5.7

2015

7.5

2006

7.4

2017

7.4