# Display statistical information
	fun print_summary
	do
		var list = self.sort
		print " population: {list.length}"
		if list.is_empty then return
		print " minimum value: {self[list.first]}"
		print " maximum value: {self[list.last]}"
		print " total value: {self.sum}"
		print " average value: {div(self.sum,list.length)}"
		print " distribution:"
		var count = 0
		var sum = 0
		var limit = self[list.first]
		for t in list do
			if self[t] > limit then
				print "  <={limit}: sub-population={count} ({div(count*100,list.length)}%); cumulated value={sum} ({div(sum*100,self.sum)}%)"
				count = 0
				sum = 0
				while self[t] > limit do
					limit = limit * 2
					if limit == 0 then limit = 1
				end
			end
			count += 1
			sum += self[t]
		end
		print "  <={limit}: sub-population={count} ({div(count*100,list.length)}%); cumulated value={sum} ({div(sum*100,self.sum)}%)"
	end