The graph presents the proporation of four categories of household waste were recycled in a certain city over the period from 1992 to 2002.
What stands out on the graph is that the rate for recycled glass, papers and cans saw noticeable growth within the given timeframe while the figure for plastic recycling almost did not increase. By 2002, the figure for glass had shown dominance.
The percentages for glass recyling started with 14% in 1992, following by two fold growth to 28% in 1997 it continued its increase and reached
approximately 48% in final year.
The proportion of paper recycling displayed somewhat similar upward trends, started at 14%, a number that then soared to hit its considerable rise at about 31% in 1997. After that, it peaked to just under 40% in the final year. On the other hand, proportion of cans recyling, which showed the highest percentage in 1992 at 18%. Hovever it dropped to 13% by 1997. Despite this decline, it climbed to 24% in 2002. Finally, the figure for plastic recycling percentage, which was accounted only a slight rise for the given periods. In 1992, it showed almost 10% of recyling, then it minimally went up to 12% in 1997 and maintained its trend to year 2002.