The line graph illustrates amount of cases of X disease in United States of America from 1983 to 1992. It can be clearly seen that there was no ill people at the end of the period.
Initially at 1983, number of cases was 100. After 2 years values were almost same. Although this number at 1986 this number doubled, at 1988 sharply declined to old position as 1983. There was a rapid increase between 88′ to 89′. Number of cease reached the peak at 400. after the 3 years this trend stood at 350. At 91′ the X disaes number was significantly dipped to 0.
In conclusion, this disease trend was turned back to the same position 1988. However in this year X disease climbed to summit and then dramatically reached to 0. At the end of the period (1992) nobody had X disease at the United States of America.