2009

7.2

2003

6.2

2007

6.1

1992

7.5

1975

4.5

2020

6.9

1999

6.6

2009

7.8

1971

6.8

1973

6.2

2021

5.7

1984

6.5

2009

6.4

2011

6.6

2005

6.3

6.3

1974

7.0

1969

7.6

2001

7.4

2000

7.2