Hyderabad is the financial and economic capital of the state of Andhra Pradesh. The city is the largest contributor to the states gross domestic product, state tax and excise revenues. The workforce participation is about 29.55 percent. Starting in the 1990s, the economic pattern of the city has changed from being a primarily service city to being one with a more diversified spectrum, including trade, transport, commerce, storage, communication etc. Service industry is the major contributor, with urban workforce constituting 90% of the total workforce.