2003

6.8

1989

6.3

1982

5.2

1996

6.4

2003

5.5

1999

6.0

2005

6.2

2001

6.5

1980

5.7

1994

6.5

1969

7.0

2002

6.3

2014

4.2

1999

6.5

2000

6.8

2003

6.0

1997

6.1

1964

7.5

2018

7.0

2015

6.1