The bar chart illustrates the proportions of four types of household waste that were recycled in a particular city from 1992 to 2002.
Overall, the percentage of plastic remained relatively the same, while the proportion of glass experienced a noticeable change throughout the period. In addition, the percentages of cans and paper showed an upward trend along with other categories of waste.
To be more specific, the figure for plastic was about 10% in 1992. Then it witnessed a gradual increase in 1997, which remained unchanged in the final year. As for cans, starting with under 20% of recycled waste in 1992, it dropped to almost half the next year. However, the proportion of cans rose above 20% in 2002.
Regarding paper and glass, both trends started at the same point with approximately 15% in 1992. Moreover, the percentages of both grew consistently throughout the period. However, the figure for glass was the highest in 2002, which was almost 50%.
