1944

7.6

1994

6.2

2015

0.0

2009

6.3

2000

7.4

1998

6.7

1993

6.9

1987

7.2

1988

6.7

2004

6.8

2002

5.3

1991

7.9

1961

8.1

1974

6.4

1982

6.2

1985

6.0

1968

6.3

1944

7.3

2002

6.7

1991

5.7