1939

7.6

2015

6.1

1994

8.5

1972

8.7

2002

7.6

2007

6.5

1954

6.7

1996

6.4

1997

8.3

1999

5.9

2005

6.1

1993

6.2

2012

6.9

2004

7.9

1998

7.9

2000

7.5

1990

7.5

2013

6.8

1994

8.7

1983

7.9