The provided bar chart illustrates the proportion of four types of waste products that were produced by households in a city and recycled afterwards, in three years: 1992, 1997, and 2002.
Overall, it is evident that the highest level of waste recycling was in 2002, and the least rate of recycle was seen in 1992, which was plastic recycled. Also, While the recycle of plastic, paper, and glass had an upward trend, cans experienced a fluctuation during the given period.
Starting at 15 percent, glass recycled increased significantly by more than 30 percent and reached a peak of roughly 50 percent in 2002. Although this rate for paper was ten percent higher than that for glass in the initial year, and five percent higher in 1997, it rose to below 40 percent in 2002, which was ten percent lower than glass. Meanwhile, plastic with the low of 10 percent in 1992, faced a gradual rise of almost 2 percent before staying unchanged from 1997 to 2002.
Looking into details reveals that cans recycled started at more than 15 percent, and by 1997, it had fallen sharply to 11 percent before having a remarkable climb of more than 10 percent in 2002.