2001

6.9

1991

7.5

1976

7.1

1973

7.8

2008

6.8

1952

7.3

2008

6.2

2016

7.5

2002

7.0

1992

7.4

2005

3.5

1988

8.4

2009

8.2

2017

6.7

1962

7.2

2009

5.9

1961

7.0

2000

5.2

2019

6.5

1973

7.7