pre_text: Semiconductor and IP Licensing Segment (1) Excludes operating expenses which are not allocated on a segment basis. Semiconductor and IP Licensing segment revenue for the year ended December 31, 2019 was $81.9 million as compared to $186.4 million for the year ended December 31, 2018, a decrease of $104.5 million. The decrease in revenue was due principally to revenue recorded in 2018 related to the Samsung settlement and license agreement executed in December 2018, partially offset by a one-time payment from a new license agreement signed in December 2019.
table: Years Ended December 31,
table: 2019 2018 2017
table: (in thousands)
table: Revenue:
table: Royalty and license fees $81,943 $186,425 $205,809
table: Total revenue 81,943 186,425 205,809
table: Operating expenses:
table: Research, development and other related costs 28,732 27,514 30,039
table: Litigation 3,471 26,099 36,209
table: Amortization 11,871 19,906 21,590
table: Total operating expenses (1) 44,074 73,519 87,838
table: Total operating income $37,869 $112,906 $117,971
question: Analyse this data from a financial earnings document. What is the average revenue that the company received in the last three years, i.e. from 2017 to 2019?