The provided line graph gives data on obesity rate by age distribution in one country between 1971 and 2005.
Overall, what stands out from the graph is that there were considerable upward trends with some fluctuations in all age groups over the period in question.
Looking at the details, as regards two groups of adults aged 18-29 and 30-44, the percentage of obesity in 1971 was about 7 and 15, respectively and remained stable next five years. At this point, both of groups saw a sharp increase to approximately 20% for 18-29 years old and 30% for 30-44 years old. Then the rate of the youngest group witnessed a gradual rise and levelled off at just under 25% until 2005. If we look at the rate of older group, it experienced some fluctuations, finishing at a slight over 35% in 2005.
With respect to people aged 45-64 and 65-74, the trend was similar for both groups. Having started at around 17% in 1971, the proportion of obesity went up slowly to about 19% in 1976, and then increased dramatically to about 36% in 1999. At this point, middle aged individuals’ rate experienced a plateau until 2003 and then reached a peak at approximately 40% in 2005. By contrast, the obesity percent of elderly went down slightly to 35% in the same year.