Small Businesses In US On The Rise, Reversing Six-Year Downward Trend. a new report that tracks small business activity and ownership in the United States. Though the number of established small businesses is increasing, the gain remain below pre-recession levels and just above the historical norm. reedy kauffman foundation. The Main Street Entrepreneurship Index is an indicator of main street business activity, presenting trends over the past two decades, focusing on established small businesses (firms older than five years with less than 50 employees) and trends in ownership rates. The Index measures business activity along two distinct and complementary dimensions: the rate of business owners in the economy, which is the percentage of adults owning a business in a given month – and established small business density, the ratio of established small employer businesses to the person population in the economy.