Data prior to 13th September 1996 gathered from Geoff Huston using his interpretation of postscript plot at ftp.surfnet.nl/surfnet/net-management/ip/nets.ps gathered by Erik-Jan Bos, SURFnet. Data since this date is taken using the same technique I use in the "Cidr Report". Geoff has a similiar plot at http://www.telstra.net/ops/bgptable.html.