Bank Hapoalim's apartment sales index rose 2.2 percent in April to 151.3 points, the bank reported this week. Since the beginning of the year, the index, which measures the strength of the apartment sales market, has risen 4.9%. The index is based on four parameters, including mortgages, apartment prices, income and unemployment. The bank reported that interest on mortgages has fallen 0.11%, while prices of apartments have decreased 1.4%. Average income per month in the country currently stands at NIS 7,473 and the level of unemployment is now at 7.6%, Hapoalim said in its monthly report.