pre_text: Results of Operations The following tables set forth selected consolidated statements of operations data and such data as a percentage of total revenues. The historical results presented below are not necessarily indicative of the results that may be expected for any future period (in thousands):
table: Year ended December 31,
table: 2019 2018 2017
table: Revenues
table: Subscriptions $817,811 $612,888 $465,254
table: Other 85,047 60,736 38,363
table: Total revenues 902,858 673,624 503,617
table: Cost of revenues
table: Subscriptions 160,320 109,454 89,193
table: Other 70,723 47,675 32,078
table: Total cost of revenues 231,043 157,129 121,271
table: Gross profit 671,815 516,495 382,346
table: Operating expenses
table: Research and development 136,363 101,042 75,148
table: Sales and marketing 439,100 329,116 240,223
table: General and administrative 142,027 102,773 72,313
table: Total operating expenses 717,490 532,931 387,684
table: Loss from operations (45,675) (16,436) (5,338)
table: Other income (expense), net
table: Interest expense (20,512) (16,102) (99)
table: Other income, net 9,247 6,475 1,491
table: Other income (expense), net (11,265) (9,627) 1,392
table: Loss before income taxes (56,940) (26,063) (3,946)
table: Provision for (benefit from) income taxes (3,333) 140 258
table: Net loss $(53,607) $(26,203) $(4,204)
question: Analyse this data from a financial earnings document. What is the average other cost between 2017 to 2019?