The given pie charts compare the alterations in annual spending (higher education, transportation, k-12 education, health and human resources, environmental services and other) by local governments in Someland between 1980 and 2000.
Overall, it can be seen that the proportions of environmental services increased, while the shares of other fields and k-12 education experienced marked decline. By contrast, it is interesting to note that the percentages of higher education, transportation, and health and government fluctuated over the given period.
Looking at the pie charts in more detail, the ratio of environmental services stood at 4% in 1980 and increased slightly to 5% in 1990, before peaking at 9% in 2000. However, the expenses of authorities on k-12 education plummeted from 25% to 18% over two decades.
On the other hand, the figure for higher education was still dominant at 40% in 2000, after a dramatic increase from 35% to 45% between 1980 and 1990. Furthermore, the proportions of health and human resources, and transportation were approximately equal at 14% and 16%, respectively at the beginning of the period. However, the level of health and human resources fell to 10% after increasing notably from 14% to 20% in 1990, while the figure for transportation dipped at 6% before surged to 22% at the end of the period.