The given bar chart illustrates the proportion of recycled plastic, cans, paper paper, and glass in one city. The information is given for the years 1992, 1997 1997, and 2002.
Overall, it can be apparently observed that the percentages of recycled paper and glass rised, rose, while there were not no notable changings changes in the proportion proportions of materials such materials as plastic and cans.
The It is evident that the percentages of recycled paper and glass increased over the period. In When in the beggining beginning of the period period, these numbers were about 15 per cent, cent. in By 1997, they already were had increased to 32% and 28% 28%, and in by the end of the period period, these figures made up rose to 40% and 48%, for the paper and glass respectively. The percentages percentage of recycled plastic were remained stable during throughout the period period, constituting and constituded about 10 per cent.
A fluctuation can be observed in a fluctuation for the percentages of recycled cans during the period. In 1992, this the proportion was made up approximately 18%, 18%. By whereas, in 1997, it was declined to about 13%, and by the end of the period period, it had accounted risen to 23%.