Egyptian black-market currency dealers raised their dollar rates as demand for the U.S. currency increases in the run up to nationwide protests planned for later this month. The dollar is selling for 7.57 pounds in unregulated trading, an 8.3 percent premium over the official price, according to the average of three quotes from dealers in Cairo, who asked not to be identified because the trade is illegal. That’s the highest since Bloomberg started the weekly surveys on May 21. Last week, the black-market rate was 7.46 pounds, or a 6.7 percent premium. The supply of dollars on the parallel market has fallen as demand grows before pro- and anti-government activists start nationwide demonstrations June 30, the anniversary of the day Islamist President Mohamed Morsi took office last year. The central bank has curtailed the pound’s decline in the past month after the currency plunged more than 11 percent since Dec. 30, when the regulator started dollar auctions to ration supply.