1979

5.2

1988

7.1

2000

6.8

1997

7.4

1959

5.2

2024

0.0

2005

6.6

1990

7.5

1993

7.8

1996

7.6

2005

7.1

2014

5.0

1952

7.9

1972

6.0

2006

6.3

1985

7.2

2005

7.4

2008

6.9

1994

6.4

2006

5.6