THE BRONX - More than 20 prime-time television series are currently being filmed throughout the city, bringing thousands of jobs to the area. Mayor Bloomberg said the entertainment industry contributes more than $5 billion to the city's economy every year, and that more than 100,000 New Yorkers make their living working on film and TV sets. Bloomberg kicked off the year's television season at Steiner Studios in Brooklyn, where he called for tax incentives for Hollywood studios that film in the five boroughs. City officials say there are also 4,000 local businesses, such as restaurants and hardware stores, that support on-location productions.