The statistics show the occurrences of combinations of six and more numbers. The statistics are available only for lotteries that draw 7 and more numbers.
Note: The statistics are not available if there are too many possible combinations. For example in a x/80 Keno lottery there are over 300 millions of possible combinations of six numbers. It is possible to override this limit by starting Expert Lotto with -J-Dstats.combo.nolimit=true command line switch. However in that case the application may refuse to calculate the statistics if there is not enough free RAM memory.
See also Pairs, Triplets, Quads and Pentads statistics.