2018

8.2

1994

6.2

2004

5.7

1983

3.8

1994

7.8

1996

6.8

2011

7.2

1992

2.0

1979

6.7

1992

6.7

1970

5.4

1993

4.6

1985

7.1

2013

7.5

1991

7.8

1998

6.9

1988

8.3

1969

2.0