The provided pie charts compare the proportion of five kinds of books sold by a bookseller in three separate years, 1972, 1992, 2012.
Overall, what stands out is that, the percentage of Adult Fiction and Children’s Fiction experienced an increase throughout the given timeframe, whereas that of Travel, Others, Biography saw a significant decline over the years. It is also noteworthy that Adult Fiction was the best-selling category and Biography had the lowest proportion.
Looking at the three categories, Others book commenced with 25% in 1972. After a decade there was a slightly drop at just 20%, then it significantly plummeted to just 12% in the final year. When it comes to Travel, there was a minimal rise from 15% in the first year to 18% in the second year, prior to declining considerably at just 10% in 2012. As for Biography, it stood at just 20% in 1972, after that, there was an insignificantly dip to just 15% in 1992. By 2012, it noticeably decreased to just 8%.
Turning to the remaining categories, Adult Fiction, there was inconsiderable improvement from 20% in the initial year to 25% in the following decade. After that, it reached its peak with just 45% by 2012 and kept its dominance in all three decades. Focusing on Children’s Fiction, it started at just 20% at the beginning of period, in the next decade, it witnessed marginal growth to just 22%, and there was a jump to just 25% in the final year.