A new report shows that California and other blue states, such as New York and Illinois, have seen declines in their percentage of children under 10 over the last decade. If that trend continues it could increase those states economic woes, as it would hinder growth and impose more of a tax burden on a smaller number of workers financing a larger number of retirees. California had traditionally relied on migration from other states to grow it population. But for the first time more than half of Californian's in the prime child-producing years of 25 to 34 were born in the Golden State. Furthermore, declines in migration from Mexico and in the number of children born by immigrants complicates the state's long term demographic future. Out-migration of businesses to Texas and other states also presents a problem.