1975

4.8

0.0

2007

6.7

1998

7.1

1990

6.0

1997

7.5

1996

5.9

1977

7.1

1969

7.0

1989

5.5

2006

6.6

2003

7.4

1988

6.3

1991

6.4

2003

8.1

1999

0.0

1973

8.2

2021

6.5

2013

5.5

1969

7.6