This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Like the rest of India, Hyderabad has a large informal economy that employs 30% of the labour force.:71 According to a survey published in 2007, it had 40–50,000 street vendors, and their numbers were increasing.:9 Among the street vendors, 84% are male and 16% female,:12 and four fifths are "stationary vendors" operating from a fixed pitch, often with their own stall.:15–16 Most are financed through personal savings; only 8% borrow from moneylenders.:19 Vendor earnings vary from ₹50 (74¢ US) to ₹800 (US$12) per day.:25 Other unorganised economic sectors include dairy, poultry farming, brick manufacturing, casual labour and domestic help. Those involved in the informal economy constitute a major portion of urban poor.:71
What percentage of Hyderabad's employed are employed informally?

The primary physiological cue for migration are the changes in the day length. These changes are also related to hormonal changes in the birds. In the period before migration, many birds display higher activity or Zugunruhe (German: migratory restlessness), first described by Johann Friedrich Naumann in 1795, as well as physiological changes such as increased fat deposition. The occurrence of Zugunruhe even in cage-raised birds with no environmental cues (e.g. shortening of day and falling temperature) has pointed to the role of circannual endogenous programs in controlling bird migrations. Caged birds display a preferential flight direction that corresponds with the migratory direction they would take in nature, changing their preferential direction at roughly the same time their wild conspecifics change course.
What is the primary cue for migration?

Cyprus suffers from a chronic shortage of water. The country relies heavily on rain to provide household water, but in the past 30 years average yearly precipitation has decreased. Between 2001 and 2004, exceptionally heavy annual rainfall pushed water reserves up, with supply exceeding demand, allowing total storage in the island's reservoirs to rise to an all-time high by the start of 2005. However, since then demand has increased annually – a result of local population growth, foreigners moving to Cyprus and the number of visiting tourists – while supply has fallen as a result of more frequent droughts.

When did Cyprus receive enough rainfall to fill up their water reserves?