grow-1----Page:2
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17 

IPv4 Routing Table Size
Data assembled from a variety of sources,
Including Surfnet, Telstra, KPN and Route Views. Each colour represents a time series for a single AS.

The major point here is that there is no single view of routing. Each AS view is based on local conditions, which include some local information and also local filtering policies about external views.
PPT Version