1999

7.2

2000

6.1

1975

7.8

1971

7.4

1972

7.7

1960

8.4

1972

7.1

1988

7.8

2001

7.4

1999

6.5

2002

7.5

2004

7.3

2007

7.4

1976

6.2

2002

6.8

1971

5.5

2023

6.6

2005

6.2

2002

6.7

1993

7.0