The three pie charts illustrate the distribution of annual expenditure by local authorities in Someland across three distinct years: 1980, 1990, and 2000. Overall, Higher Education remained the primary focus of local authority spending throughout the period, whereas other sectors experienced notable shifts in their relative importance.
In 1980, Higher Education comprised 35% of total spending, followed by K-12 Education at 25%. By 1990, the allocation for Higher Education rose to a peak of 45%, while K-12 Education and Transportation saw declines to 20% and 6% respectively. Conversely, spending on Health and human resources increased from 14% in 1980 to 20% in 1990. By 2000, Higher Education spending had dipped slightly to 40%.
Regarding the remaining categories, Transportation spending was most volatile, dropping from 16% in 1980 to 6% in 1990, before surging to 22% in 2000, making it the second-largest expenditure category. Environmental services saw a gradual increase from 4% in 1980 to 9% by 2000. Meanwhile, the proportion dedicated to 'Other' services dwindled steadily from 6% to 1% over the twenty years, and Health and human resources fell back to 10% by the end of the period.