Most Recent Update: 17 October 1998.
Warning! Known problems exist with the data used to produce
these results. This analysis is preliminary, and should not be cited!
This program allows you to display trends for 3 time intervals, by either species or region. |
Comparison of 1966-1997 results with 1966-1996 results and with a 1966 - 1997 analysis omitting routes started after 1992 |
