Most of the employed are in manufacturing (23.5%) commerce (39,7%) and services (33.3%). Over 91% of all businesses in the borough are related to commerce and services. However, manufacturing contributes to 61.8% of the borough GDP, with commerce at 18.9% and services at 18%. After agriculture, the most visible economic activity is tourism, which is considered part of commerce and services. The canals, chinampas and trajineras are the borough's main tourist attraction. In February 2011, trajinera operators protested the existence of “clandestine” tour operators supposedly tolerated by authorities. There are supposedly as many as twenty five or thirty of these who pay bribes of 500 pesos a month to operate away from the six embarcaderos authorized by the borough. However, relative to the rest of the city, Xochimilco has a negligible amount of hotel infrastructure. There are no five star hotels. There are 183 four-star and 98 three-star hotels, but they represent only two percent and one percent respectively of the total for the city.