Overall, I found that the user is a person who trains service at age 20-30 years, there were at most a total of 128 people accounted for 32 percent of all samples so as people age is less than 20 years ago, there were 112 people, which accounted for 28 per cent, and 60 years of age, teams up with the smallest loop plate. There are a number of 13 people, 3.3 percent of all samples by La- As shown in table 4.2
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