2003

6.6

2001

6.8

2019

6.9

2006

5.1

2007

6.9

1977

7.4

2002

6.1

2001

6.9

1995

7.3

2009

7.5

2012

4.4

1995

7.3

1988

5.8

1989

5.0

1975

5.5

1996

6.7

1931

3.0

2000

7.2

2003

7.8

1968

7.6