2015

7.5

1964

7.4

2000

6.2

2009

7.9

1971

6.7

2008

7.0

2005

7.0

2008

6.9

1990

7.4

2000

7.7

1994

8.3

1931

7.1

2007

6.0

2007

5.5

2007

6.3

2005

6.8

1952

8.3

2007

7.2

2006

6.4

2007

6.6