Calculate the net operating income and operating margin for this year and last year using the table information below

Income statement (in thousands)	this year	last year
OPERATING REVENUES
Gross Patient Service Revenue	$258, 125	$263, 469
Free Care	5,800	6,024
Contractuals	69, 320	67,985
Net Patient Service Revenue	183, 005	189, 460
other operating revenue	14, 600	14, 843
total operating revenue	$197,605	$204, 303
OPERATING EXPENSES
depreciation	13, 152	13, 805
interest	3, 222	5, 026
bad debt	5,163	6,866
other operating expenses	168, 585	173, 634
Total operating expenses	$190,122	$199, 331