, the second is for vehicles and parking garages and the third is a memorandum of understanding betweenmta and bart -- between mta and bart. this shows the revenues associated with those three agreements generated during a 10-year time frame through 2010. you can see over the past four years, the revenues have increased by $7.4 million. the increases are largely related to mta's success in negotiating a financial terms for contracts, which in part resulted from good economic climate in place when the contracts were negotiated. the transit advertising generates a majority of revenues for advertising on city property. as a result of the audit, we found mta has demonstrated a lack of success in monitoring some of these advertising terms. for example, advertising for five of the city parking garages under mta management, titan has not sold any advertisements in these parking garages since the beginning of the agreement in 2009. titan has reported little interest in purchasing advertising space is in parking garages given the poor economic climate. but we noted the airport, their agreement resu