1972

7.1

1992

6.5

2013

7.6

1994

7.7

2007

6.0

1993

5.4

2007

10.0

2002

8.4

1991

6.4

2003

6.6

1949

6.2

1993

6.4

2012

8.0

1990

5.8

1956

7.2

1982

7.5

2016

5.7

2013

7.3

1952

7.0

1990

6.5