Table 3.

Estimated numbers and fractions of ${\mathrm{PM}}_{2.5}-\text{attributable}$ deaths in adults in the continental United States in 1980, 1990, 2000, and 2010.

Year	Estimated numbers of ${\mathrm{PM}}_{2.5}$ attributable deaths (95% confidence interval)a		Estimated percentage of total deaths attributable to ${\mathrm{PM}}_{2.5}$
	Krewski et al. (2009)b	Nasari et al. (2016)c	Krewski et al. (2009)b	Nasari et al. (2016)c
1980	190,000 (130,000–240,000)	280,000 (130,000–990,000)	8.63%	12.74%
1990	170,000 (110,000–220,000)	260,000 (120,000–910,000)	8.39%	12.69%
2000	140,000 (98,000–190,000)	230,000 (79,000–990,000)	6.40%	10.21%
2010	120,000 (83,000–160,000)	200,000 (43,000–1,100,000)	5.02%	8.13%

^aEstimates rounded to two significant figures.

^bCounts of premature deaths estimated using a risk coefficient reported in the Krewski et al. (2009) long-term cohort study.

^cCounts of premature deaths estimated using risk coefficients reported in the Nasari et al. (2016) long-term cohort study.