As of December 31,
2019
2018
2017
2016
2015
Balance sheet and other data:
Cash and cash equivalents
$119,629
$146,061
$96,329
$140,634
$128,358
Working capital
167,879
152,793
119,433
150,485
131,971
Total assets
557,799
440,985
371,641
261,245
226,095
Total long-term obligations
115,143
88,126
94,311
30,297
26,885
Total stockholders' equity
355,651
277,589
232,827
191,249
170,131

text: ITEM 6. SELECTED FINANCIAL DATA
text: The selected consolidated statements of operations data for the years ended December 31, 2019, 2018 and 2017 and the selected consolidated balance sheet data as of December 31, 2019 and 2018 are derived from our audited consolidated financial statements included elsewhere in this Annual Report. The selected consolidated statements of operations data for the years ended December 31, 2016 and 2015 and the selected consolidated balance sheet data as of December 31, 2017, 2016 and 2015 are derived from our audited consolidated financial statements not included in this Annual Report. Our historical results are not necessarily indicative of the results to be expected in the future. The selected financial data should be read together with Item 7. "Management’s Discussion and Analysis of Financial Condition and Results of Operations" and in conjunction with our consolidated financial statements, related notes, and other financial information included elsewhere in this Annual Report. The following tables set forth our selected consolidated financial and other data for the years ended and as of December 31, 2019, 2018, 2017, 2016 and 2015 (in thousands, except share and per share data).
text: Information about prior period acquisitions that may affect the comparability of the selected financial information presented below is included in Item 1. Business. Information about the $28.0 million expense recorded in general and administrative expense in 2018, which relates to the agreement reached to settle the legal matter alleging violations of the Telephone Consumer Protection Act, or TCPA, and may affect the comparability of the selected financial information presented below, is disclosed in Item 3. “Legal Proceedings.” Information about the $1.7 million of interest recorded within interest income and the $6.9 million of gain recorded within other income, net, in 2019, which relates to promissory note proceeds received from one of our hardware suppliers and proceeds from an acquired promissory note, and may affect the comparability of the selected financial information presented below, is disclosed in Item 7. "Management’s Discussion and Analysis of Financial Condition and Results of Operations."
text: Certain previously reported amounts in the consolidated statements of operations for the years ended December 31, 2018, 2017, 2016 and 2015 have been reclassified to conform to our current presentation to reflect interest income as a separate line item, which was previously included in other income, net.

Questions:
question: What were the cash and cash equivalents in 2019?
answer: $119,629
scale: thousand
question: What was the working capital in 2018?
answer: 152,793
scale: thousand
question: Which years does the table provide data for total assets?
answer: 2019
2018
2017
2016
2015
question: What was the change in working capital between 2015 and 2016?
answer: 18514
derivation: 150,485-131,971
scale: thousand
question: What was the change in total stockholders' equity between 2016 and 2017?
answer: 41578
derivation: 232,827-191,249
scale: thousand
question: What was the percentage change in the total assets between 2018 and 2019?
answer: 26.49
derivation: (557,799-440,985)/440,985
scale: percent