The bar chart gives information about the proportions of four different kinds of residential waste that was recycled in a particular city from 1992 to 2002.
Overall, recycling became increasingly more common amongst households in this city, with paper and glass being the most widely recycled materials in the last five years.
In 1992, approximately 15% of household waste paper was recycled, and by 2002 the figure had risen considerably to nearly 40%. Glass followed a similar upward trend, starting at roughly the same percentage as recycled paper, then increasing substantially to become by far the most recycled material at the end of the period, at almost 50%.
With regard to cans, they were the most recycled material by percentage in comparison to other types of household waste in the first year, accounting for around 18%. However, this figure dipped and hit a low of about 13% half a decade later before recovering to end the period at roughly 24%. Interestingly, it was the only category to experience a downward trend in the middle year.
Lastly, plastic was consistently the least recycled material, increasing by only around 1% over the period to finish at approximately 11%. While the figures for recycled plastic were consistently the lowest, they were also more stable than any other types of household waste.