1991

8.1

1995

7.0

1946

7.7

1994

5.9

2000

5.9

1993

7.5

2002

6.9

2006

5.5

1999

7.5

1992

6.9

1990

7.5

1955

7.3

2006

7.4

2004

7.9

2016

4.6

2015

5.4

1990

0.0

1988

2.0

1984

4.5

1997

6.8