Netscape V 1.22 or later is needed to view the PBA correctly.

Older versions of Netscape will not read the charts and tables correctly!

• 1980 Edition ( read introduction to 1990 edition before reading this)
• 1985 Supplement
• 1990 Edition
• 1991-1994 Supplements
• 1995 Supplement
• 1996 Update
• 1997 Update
• Mid Year Commentary - comments as of July, 1997
• 1998 Update
• Fall 1998 Comments  - comments as of July, 1998
• 1999 Update
• Interim 2000 Update
•  2000 Popularity  - 1985 - 2000 Popularity (this is an addendum to the Millenium CD - it was erroneously omitted from some copies of the cd)
•  Millenium Issue