1979

5.4

2001

7.3

1950

8.1

1961

7.6

1974

7.8

1971

7.6

2003

6.6

2000

3.0

2003

6.0

2006

6.5

1987

7.1

1977

6.9

1995

6.4

2019

5.4

2008

7.5

1999

4.2

2000

7.4

2024

6.1

1990

6.2

2002

5.7