You like Excel 2007 Data Bars? 
[5]
Well, you can do something similar using a function for previous versions:
[6] 
[7]
The function is : REPT
REPT (text, number_times)
[8]
More info from MS: http://office.microsoft.com/en-us/excel/HP052092361033.aspx [9]http://office.microsoft.com/en-us/excel/HP052092361033.aspx [9]
Links:
[1] http://pulse.veltsos.com/category/it/data
[2] http://pulse.veltsos.com/category/it/database
[3] http://pulse.veltsos.com/category/it/software/software/os/microsoft
[4] http://pulse.veltsos.com/category/it/software
[5] http://linux.philosweb.com/drupal5/files/image_2_75.png
[6] http://linux.philosweb.com/drupal5/files/image_4_28.png
[7] http://linux.philosweb.com/drupal5/files/image_6_11.png
[8] http://linux.philosweb.com/drupal5/files/image_8_7.png
[9] http://office.microsoft.com/en-us/excel/HP052092361033.aspx