Table:
Reconciliation of Non-GAAP measure - operating expenses and operating income from continuing operations, excluding certain items (in thousands)	Years Ended December 31,

2019	2018

Gross profit from continuing operations, as reported	$ 315,652	$365,607

Adjustments to gross profit:

Stock-based compensation	525	742

Facility expansion and relocation costs	3,891	1,328

Acquisition-related costs	8,290	569

Non-GAAP gross profit	328,358	368,246

Non-GAAP gross margin	41.6%	51.2%

Operating expenses from continuing operations, as reported	261,264	194,054

Adjustments:

Amortization of intangible assets	(12,168)	(5,774)

Stock-based compensation	(6,803)	(8,961)

Acquisition-related costs	(12,002)	(1,726)

Facility expansion and relocation costs	(948)	(518)

Restructuring charges	(5,038)	(4,239)

Non-GAAP operating expenses	224,305	172,836

Non-GAAP operating income	$ 104,053	$ 195,410

Answer the following question considering 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).

Context:
Non-GAAP Results
Management uses non-GAAP operating income and non-GAAP EPS to evaluate business performance without the impacts of certain non-cash charges and other charges which are not part of our usual operations. We use these non- GAAP measures to assess performance against business objectives, make business decisions, including developing budgets and forecasting future periods. In addition, management’s incentive plans include these non-GAAP measures as criteria for achievements. These non-GAAP measures are not in accordance with U.S. GAAP and may differ from non- GAAP methods of accounting and reporting used by other companies. However, we believe these non-GAAP measures provide additional information that enables readers to evaluate our business from the perspective of management. The presentation of this additional information should not be considered a substitute for results prepared in accordance with U.S. GAAP.
The non-GAAP results presented below exclude the impact of non-cash related charges, such as stock-based compensation and amortization of intangible assets. In addition, they exclude discontinued operations and other nonrecurring items such as acquisition-related costs and restructuring expenses, as they are not indicative of future performance. The tax effect of our non-GAAP adjustments represents the anticipated annual tax rate applied to each non-GAAP adjustment after consideration of their respective book and tax treatments and effect of adoption of the Tax Act.

Question: What was the percentage change in acquisition-related costs between 2018 and 2019?

((8,290-569)/569) * 100, therefore {"answer": "1356.94", "scale": "percent"}