Wealthy Nevadans with incomes topping $1 million are more generous in their philanthropic donations than the national average of high-end earners, according to a report released Wednesday.The report by Private Bank, a division of Nevada State Bank that serves well-off clients, said the average contribution from Nevada’s high net worth households was $138,320 in 2009, 8.2 percent higher than national average. “Oftentimes, people suggest that Nevadans are less generous when it comes to charitable giving, but this certainly cannot be said about the high net worth segment of the population,” said Jeremy Aguero, principal at Applied Analysis who compiled research …