2019		2018		2017		2016		2015
Sales	$	545,705	$	363,803	$	291,042	$	196,650	$	142,500
Cost of goods sold		264,538		176,325		143,150		95,892		68,400
Accounts receivable		26,521		21,246		19,907		11,504		9,747

Compute trend percents for the above accounts, using 2015 as the base year.