The provided bar chart gives data about the percentage of different kinds of magazines sold by the company through three distinct years: 1975, 1995 and 2015.
Overall, it is clearly seen that the percentage of types of magazines were saw a steep variation, while the sales of sporting type were a gradual increase over the period.
According to the bar chart, the sales figures of sports magazines took a highest position through 40 years, standing at around 33% in 1975 and increasing gradually at just over 35% in 2015. Contrary to the sales of sports magazines, the proportion of fashion magazines witnessed a significant decrease, starting at nearly 25% and continuing to decline by 5% in the end of the period, with this decline made the fashion magazines take the lowest position by 2015.
Meanwhile, the percentage of health magazines experienced a stable trend, remaining at 20% in both 1995 and 2015, while the sales of food and others magazines experienced this trend, maintaining at about 10% and 25% respectively, at both the beginning and the end of the period.