U.S. - Air purification equipment manufacturing - by Year
Introductory text includes scope and methodology. Table includes only establishments with payroll. Nonemployers are shown separately. For descriptions of column headings and rows (industries), click on the appropriate underlined element in the table.

More data	Year	Firms by employment size of enterprise				Paid employees by employment size of enterprise
		Total	20 +	100 +	500 +	Total	20 +	100 +	500 +
	2008	318	39.9%	12.9%	8.5%	15,375	91.9%	68.2%	50.3%
	2007	305	40.3%	14.4%	8.9%	14,939	92.1%	70.1%	54.3%
	2006	303	40.6%	13.9%	8.3%	14,883	92.7%	70.6%	56.1%
	2005	310	40.6%	13.5%	7.7%	14,428	92.0%	69.4%	54.3%
	2004	317	41.3%	13.6%	7.3%	15,368	92.5%	70.7%	51.2%
	2003	321	42.1%	14.0%	6.2%	15,499	92.3%	68.4%	47.3%
	2002	312	37.2%	12.8%	5.4%	13,597	91.3%	67.1%	47.3%
	2001	308	38.6%	13.6%	6.8%	16,948	93.2%	73.9%	54.4%
	2000	306	40.5%	14.4%	7.5%	17,245	93.8%	74.6%	57.4%
	1999	318	39.0%	15.4%	7.2%	16,101	92.1%	72.3%	50.5%
	1998	343	38.5%	15.7%	8.5%	15,629	92.3%	71.7%	51.3%