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The line graph illustrates the obesity rate among four different age groups from 1971 to 2005. Overall, all groups experienced a dramatic rise about percent of obesity rate between 1976 and 1999,whereas only the 45-64 age group ended with the highest obesity rate from 2003 to 2005.Additionally, both 30-44 and 18-29 remained the lowest about obesity rate throughout the period. Looking at the group of the oldest people age : 45-64,65-74.From 1971 to 1976, two age groups remained stable at approximately 17.0% before increasing sharply around 35.0% for both groups in 1999.While the figure for people (45-64) was unchanged roughly 36.0% between 1999 and 2003, the number of obese people(65-74) had the percentage declined slightly about 34.0% in 2003.After that, 45_64 went up steadily the proportion than 65-74 through the period when the it was the highest of obesity rate in all various age groups. On the other hand, the group of the youngest people age: 18-29,30-44.Likewise they both reached around to 15.0%(30-44) and 8.0%(18-29) from 1971 to 1976 after rising sharply the proportions of rate about 29.0%(30-44) and 22.0%(18-29) in 1999. A figure of (18-29) still remained stable roughly 23.0% by 2005 although the obesity rate (30-44) grew more gradually than (18-29) during the period .Therefore, it was noticeable that the proportion of obesity rate rose dramatically