The chart details the waste collection by a particular recycling center from 2011 to 2015. Looking from an overall perspective, an upward trend is readily apparent in all the four types of wastage, with paper and garden items being the most and least collected categories in the 5-year-period respectively.
57 tons of paper was brought to the center at the beginning of the period. However, the number decreased and even hit a slump in 2013, with merely 40 tons being recorded. The number eventually surged to 51 and reached its peak at 70 tons of paper at the end of the period. A similar pattern was observable in its garden counterpart, commencing at a 32-tons level of waste in 2011. The number of wastage hit its lowest point at 15 tons in 2012, followed by a sharp uptick to 31 and finally settling at 35 tons in 2015.
The remaining kinds of waste, including glass and tins, experienced a milder change throughout the period. Both recorded a 4 tons of increase penetrating through the entire chart, with glass being received from 48 to 52 tons and tins from 35 to 39 tons in the timeframe of 5 years.