The bar chart give information about the proportions of four types of recycled domestic waste, namely plastic, cans, paper, and glass between 1992 and 2002.
Overall, the figures for household waste that was recycled in all categories experienced an upward trend. In addition, the most notable change was witnessed in the recycling rate of glass.
Regarding two types of waste witnessed different patterns over the years, in 1992, cans accounted for almost 20% of the total proportion, compared to the figure for plastic, at only 10%. By 1997, the percentage of cars recycled declined slightly to about 13%, but later it rose by around 10% at the end of the period. In contrast, by 1997, this data of plastic had experienced an insignificant increase to around 12%, before remaining unchanged in the next five years.
In terms of the other categories whose trends were almost the same, in 1992, the recycling rates of paper and glass were relatively similar, at around 15%. By 1997, this figure for paper had doubled, to over 30% and then continued to grow steadily to nearly 40% in 1992. Similarly, the proportion of glass recycled increased considerably to approximately 28% in 1997 and after which it soared to just under 50%, being the highest figure at the end of the period.