The following table presents disaggregated revenue by major product and service categories for the years ended December 31, 2018, 2017, and 2016 (in thousands):



	For the Years Ended December 31,
	2018		2017		2016
CAG segment revenue:
CAG Diagnostics recurring revenue:	$	1,654,530	$	1,451,701	$	1,281,262
IDEXX VetLab consumables	617,237		518,774		451,456
Rapid assay products	217,541		205,309		189,122
Reference laboratory diagnostic and consulting services	746,794		660,142		581,067
CAG Diagnostics services and accessories	72,958		67,476		59,617
CAG Diagnostics capital - instruments	134,264		119,963		121,191
Veterinary software, services and diagnostic imaging systems	146,634		131,713		120,236
CAG segment revenue	1,935,428		1,703,377		1,522,689

Water segment revenue	125,198		114,395		103,579
LPD segment revenue	130,581		128,481		126,491
Other segment revenue	22,035		22,805		22,664

Total revenue	$	2,213,242	$	1,969,058	$	1,775,423

Revenue by principal geographic area, based on customers’ domiciles, was as follows (in thousands):



	For the Years Ended December 31,
	2018		2017		2016
Americas
United States	$	1,357,909	$	1,203,547	$	1,089,595
Canada	94,206		83,818		74,923
Latin America	50,969		46,893		38,872
	1,503,084		1,334,258		1,203,390

Europe, the Middle East and Africa
Germany	100,459		88,328		80,156
United Kingdom	87,807		80,149		77,671
France	60,319		55,993		51,204
Italy	36,956		31,889		28,907
Spain	33,687		28,866		24,268
Switzerland	19,875		17,913		16,361
Netherlands	18,090		15,877		14,049
Other	114,877		100,409		83,147
	472,070		419,424		375,763
Asia Pacific Region
Australia	63,386		56,994		52,871
China	57,621		55,810		48,257
Japan	60,213		53,344		51,544
Other	56,868		49,228		43,598
	238,088		215,376		196,270
Total	$	2,213,242	$	1,969,058	$	1,775,423