update: 7 June 2011
Extended explanations on the definition adapted here for an exoplanet
and criteria for inclusion in the catalogue can be found in
"Defining and cataloging exoplanets: The exoplanet.eu database"
(J. Schneider, C. Dedieu, P. Le Sidaner, R. Savalle and I. Zolotukhin)
Astron. and Astrophys., accepted
paper
The statistics provided by the statistical tools are only indicative.
They do not take into account biases due to selection effects.