The chart illustra data about how many North America population of various age groups who frequently go to the gym from 1990 to 2010.There are 4 lines give information about the amount of age groups according to years.
Overall,the red and blue lines which represents subsequently 18-23 and 24-33 age groups made up the largest proportion of gym members despite significant fluctuations.The purple and yellow lines which symbolize based on 34-43 and 44-53 age categories show a lower ratio over the years.
Initially, the red line began approximately with 16% which accounted the highest percentage among others.It reached 23% in 1994 , 20% in 1998 and showed an upward trajectory during 1998-2010 and climbed the highest point (26%) in 2010.The blue line introduced the second highest proportion despite minor fluctuations which it rose between 1990-1994 and 1998-2006.Declines was happened between 1994-1998 and 2006-2010.Even so,it reached the highest level with 25% in 2006 compared to other lines.
The purple and yellow lines showed specific difference which they were stable between 1990-1994.Both of them climbed steadily between 1994-1998. Then, the purple line experienced a sharp rise compared to yellow line between 1998-2010.