* As of December 31, 2016 (unit: lbs.)

2016 Total : 41,387,274
 

2015 Total : 47,972,402
2015 for regulatory states: 46,485,775
2015 for non-regulatory states: 1,381,077
2015 voluntary one-day collection events: 60,550

 

2014 Total : 48,237,687
2014 Voluntary: 749,965
2014 Mandatory: 47,487,722

 

2013 Total : 48,922,696
2013 Voluntary: 539,779
2013 Mandatory: 48,382,917