x = (NW - 11030)/(lvl-20/50)
where x is the approximate net worth per level 'jump' (50 levels) of the ToJ. A base ToJ, lvl20, has a NW of 11,030 so hopefully you can figure out where my formula came from. The numbers are only approximate, obviously, since NW between same-level tats can vary.
Here are my results:
lvl 130,420 || NW 2,233,164 || x = 852.045
lvl 127,470 || NW 2,179,327 || x = 850.646
lvl 117,970 || NW 2,006,647 || x = 845.959
lvl 108,970 || NW 1,844,131 || x = 841.258
lvl 79,520 || NW 1,309,922 || x = 816.913
lvl 69,320 || NW 1,125,257 || x = 803.916
lvl 59,520 || NW 948,084 || x = 787.440
lvl 47,070 || NW 740,929 || x = 775.663
lvl 40,920 || NW 638,242 || x = 766.763
lvl 34,220 || NW 526,950 || x = 754.269
lvl 32,620 || NW 500,404 || x = 750.574
lvl 28,520 || NW 432,196 || x = 738.888
lvl 24,920 || NW 372,918 || x = 726.683
lvl 21,770 || NW 320,892 || x = 712.326
lvl 17,170 || NW 250,924 || x = 699.399
lvl 15,570 || NW 226,727 || x = 693.559
lvl 13,220 || NW 191,125 || x = 682.178
lvl 10,470 || NW 149,918 || x = 664.536
lvl 8,770 || NW 124,548 || x = 648.674
lvl 6,570 || NW 93,068 || x = 626.244
lvl 3,820 || NW 55,917 || x = 590.618
lvl 1,020 || NW 20,729 || x = 492.35
lvl 770 || NW 18,318 || x = 485.867
lvl 120 || NW 11,776 || x = 373
And in case you're as morbidly curious, here's a graph charting lvl (x-axis) vs. x (y-axis)