Expressing changes in number and rate

Situation 1: In Toronto in 1990 the population was 100 and the number of obese people was 10. In 2000 the population was 110 and the number of obese people was 11.

1. From 1990 to 2000, the total population in Toronto increased from 100 to 110.
2. The population of Toronto increased by 10%.
3. Although within the 10-year range, 1990 to 2000, the obesity rate in Toronto had stayed at 10%, it had increased to 20% in Hong Kong.
4. In TO, the population grew from 100 in 1990 to 110 in 2000, but the number of obese people changed from 10 to 11 in this decade.
5. In the decade beginning in 1990, the number of obese in Toronto rose by 10.
6. In the ten years ending in 2000, the number of obese in TO increased to 110.
7. In the ten years ending in 2000, the number of obese in TO remained at 10%.
8. In 1990 the amount of obese people in Hong Kong was 10 and it has incrased to 22 in 2000.

Situation 2: In Hong Kong in 1990 the population was 100 and the number of obese people was 10. In 2000 the population was 110 and the number of obese people was 22.

Situation 3: Other

1. From time 1 to time 2 the increased consumption of energy was from 10 to 20%.