Table:
Years ended December 31,	2019 vs 2018	2018 vs 2017

2019	2018	2017	% Change	% Change

(in thousands, except percentages)

General and administrative	$ 178,934	$ 107,444	$ 67,719	66.5 %	58.7 %

Percentage of total revenues	11.3 %	10.0 %	10.1 %

Answer the following question based on both the table and the accompanying text, produce your answer and, if helpful, briefly explain your calculation. Conclude with JSON: {"answer": ["ANSWER"], "scale": "SCALE"} ("scale" = "" if no unit).

Supporting text:
General and Administrative
General and administrative expenses increased $71.5 million, or 66.5%, for the year ended December 31, 2019 compared to the same period in 2018, due to an increase of $28.7 million in employee-related costs ($12.2 million of which related to stock-based compensation and related payroll taxes), a $14.9 million increase in finance costs, which include an estimated net liability for non-recurring HST payable to the Government of Canada in the amount of $8.1 million related to 2019 and prior years, sales and use and other value added taxes, insurance, and bank fees, a $9.0 million increase in Shopify Payments losses driven by increased GMV processed through Shopify Payments, a $8.6 million increase in losses and insurance related to Shopify Capital driven by an expansion of our Capital offerings and programs, a $6.9 million increase in professional services fees for legal and tax services, including those related to our international expansion and the growth of our business, a $1.8 million increase in computer and software costs, and a $1.6 million increase in general bad debt expense. General and administrative expenses increased $71.5 million, or 66.5%, for the year ended December 31, 2019 compared to the same period in 2018, due to an increase of $28.7 million in employee-related costs ($12.2 million of which related to stock-based compensation and related payroll taxes), a $14.9 million increase in finance costs, which include an estimated net liability for non-recurring HST payable to the Government of Canada in the amount of $8.1 million related to 2019 and prior years, sales and use and other value added taxes, insurance, and bank fees, a $9.0 million increase in Shopify Payments losses driven by increased GMV processed through Shopify Payments, a $8.6 million increase in losses and insurance related to Shopify Capital driven by an expansion of our Capital offerings and programs, a $6.9 million increase in professional services fees for legal and tax services, including those related to our international expansion and the growth of our business, a $1.8 million increase in computer and software costs, and a $1.6 million increase in general bad debt expense.
General and administrative expenses increased $39.7 million, or 58.7%, for the year ended December 31, 2018 compared to the same period in 2017, due to an increase of $30.3 million in employee-related costs, a $4.5 million increase in professional services fees for legal and tax services, a $4.0 million increase in finance costs, which includes insurance, sales and use and other value added taxes, and a $1.7 million increase in computer and software costs.

Question: What is the change in the average general administrative expenses between 2017-2018, and 2018-2019?

[(178,934+107,444)/2] - [(107,444+67,719)/2], therefore {"answer": "55607.5", "scale": "thousand"}