1997

6.6

1964

5.4

1997

6.1

2002

5.9

1996

6.9

1997

6.8

2004

7.2

2000

7.6

1993

7.1

1994

7.8

1998

7.5

1999

5.6

2002

7.5

1997

6.5

2003

6.4

1996

1.0

2002

7.3