Output taxonomic-level-coverage has integer levels when 0% species

[AroneyS]

No species-level assignments

sample	level	coverage	relative abundance (%)
DRR083195_1	1	2.89	16.16
DRR083195_1	2	0.99	5.54
DRR083195_1	3	3.23	18.06
DRR083195_1	4	1.45	8.11
DRR083195_1	5	5.01	28.02
DRR083195_1	6	4.31	24.11

Some species-level assignments

sample	level	coverage	relative abundance (%)
DRR083195_1	domain	2.72	15.07
DRR083195_1	phylum	1.32	7.31
DRR083195_1	class	3.23	17.89
DRR083195_1	order	1.45	8.03
DRR083195_1	family	5.04	27.92
DRR083195_1	genus	3.7	20.5
DRR083195_1	species	0.59	3.27