Israel's capital, Jerusalem, is the most populous, crowded and poor of Israel's 10 largest cities -- but its residents are also the happiest, a Central Bureau of Statistics survey conducted ahead of Jerusalem Day has found. Jerusalem Day, which falls this Wednesday, celebrates the reunification of the city in the 1967 Six-Day War. According to the survey, Jerusalem's population stands at 815,300 residents, about 10 percent of the country's entire population. Some 63 percent of Jerusalem's residents are Jewish and 37 percent are Arab. The city is the poorest of all Israel's large cities, with 30.9 percent of residents renting homes and not buying them, and is also Israel's most crowded, with an average of 1.7 individuals per room, higher than the 1.2 average in the ultra-Orthodox city of Bnei Brak. Some 77 percent of the capital's inhabitants describe themselves as religious or ultra-Orthodox. However, an overwhelming 88 percent of Jerusalemites expressed satisfaction with their lives, compared to 85 percent in the overall Israeli population.