date	waste	wastewater	air	other
2006	101.7	49.1	4.3	31.3
2007	101.7	49.7	4.2	31.0
2008	103.3	51.0	4.3	31.8
2009	105.2	53.5	4.3	32.7
2010	111.2	53.5	4.3	31.6
2011	113.4	54.9	4.3	32.3
2012	114.2	55.6	4.0	31.9
2013	114.1	55.6	4.1	31.7
2014	119.7	55.6	4.1	33.1
2015	117.9	56.0	3.9	33.4
2016	121.9	57.8	4.0	36.3
2017	124.9	58.9	3.9	36.9