25 lines (24 with data), 413 Bytes

chr1	0	249250620
chr2	0	243199372
chr3	0	198022429
chr4	0	191154275
chr5	0	180915259
chr6	0	171115066
chr7	0	159138662
chr8	0	146364021
chr9	0	141213430
chr10	0	135534746
chr11	0	135006515
chr12	0	133851894
chr13	0	115169877
chr14	0	107349539
chr15	0	102531391
chr16	0	90354752
chr17	0	81195209
chr18	0	78077247
chr19	0	59128982
chr20	0	63025519
chr21	0	48129894
chr22	0	51304565
chrX	0	155270559
chrY	0	59373565