The given line graph illustrates the proportion of four kinds of recycled domestic waste in a city from 1992 to 2002.
Overall, the levels of cans, paper, and glass followed an upward trend, with paper and glass witnessing the most significant growth. Additionally, the figure for plastic was the lowest and stagnant during the given period.
To begin with, the recycling rates of cans, paper and glass started at around 18%, 15% and 16%, respectively, in 1992. After that, paper’s percentage experienced a rapid increase, ranging from 32% in 1997 to 38% in 2002. Similarly, in 1997, over 28% of glass was recycled, and then it rose to nearly 50% in the final year, which was the highest figure during the period. In contrast, after falling by 3% five years later, the proportion of cans recycled rebounded, reaching 25% by the end of the period
Regarding the rest, plastic had the lowest recycling rate in the first years, with 10%, after which it slightly increased to 12%, before stabilizing at this level over the remaining years.