2002

5.3

2000

6.5

1975

5.7

2007

7.3

1999

7.3

1973

7.5

1994

6.1

2007

7.6

1987

6.0

1973

7.1

2014

3.1

1985

6.5

1969

7.0

2002

6.4

1999

5.9

2003

6.7

1988

6.3

1994

5.8

1996

5.7

1988

7.1