Read the following text carefully. The text uses the form of cause and effect in delivering its argument. After that, answer the following questions!

    Drought during 2011 has caused many problems. First, the people lack of clean water to either take a bath, wash clothes of drink. Consequently, the government has to spend more expenditure in social welfare. Second, many breeders do not find grass for their cattle, sheep and goats. As result, their animals get thinner day after day due to lack of enough food. Third, many farmers who depend on rainfall can’t cultivates their land. Consequently, they do not get regular income from agribusiness. This also causes the farmer labors of losing their jobs. Therefore, poverty rate gets increased this year. Finally, the drought has a great impact on the water reservoir: dams, lake, Canal. Their water levels go down of even totally dry. All of those conditions are clearly due to mono cause that is long drought in our country.

When did the long drought occur?