zero to become a significant share of the total investment. furthermore, despite a drop in 2001, investment in the sector has increased since 1999. the sspd forecasts a total investment of us$2.2 billion (4,922 billion colombian pesos) in the water and sanitation sector from 2007 to 2017 the minister of environment, housing and territorial development announced in may 2008 that us$5.2 million (9.2 billion colombian pesos) will be spent in order to facilitate the construction of facilities in areas without access to drinking water. the national government will control the destination of the resources and guarantees transparency in the whole spending process. according to the minister, colombia should already have reached full drinking water coverage, given the past investments in the sector. financing according to the ministry, the investments were mainly financed through three sources: self-financing, funding by the national government and charges for the extraction of petroleum and carbon. a world bank study estimates an investment of us$411m in 2004, which was financed as follows: us$108m (26%) by companies through self-financing us$249m (61%) by state funding through sgp us$49m (12%) by corporaciones autónomas regionales (car) or regional autonomous corporations us$5m (1%) by other sources according to the report, the average annual transfers from the national government to the municipalities for water supply and sanitation (including solid waste) were about us$278m between 1998 and 2001. 86% of that funding was allocated through the sgp as defined in law 715. a certain percentage of these resources was dedicated exclusively for water supply and sanitation. they mainly go to small municipalities that show low income levels. nevertheless, many municipalities use funding through sgp dedicated for water supply and sanitation for other purposes. the car receive property tax, electric power utilities, environmental charges for extracting water and charges for discharging waste water. external cooperation the main external cooperation partners for the colombian water and sanitation sector are the world bank, the inter-american development bank (idb) and the andean development corporation (caf). world bank the world bank supports the sector through dedicated water and sanitation projects, as well as through water and sanitation components in other, broader projects. dedicated water and sanitation projects: bogotá urban services project cartagena water supply, sewerage and environmental management project la guajira water and sanitation infrastructure and service management project water and sanitation sector support project first phase apl water sector reform assistance project non-dedicated projects: disaster vulnerability reduction first phase apl rio frio carbon offset project amoya river environmental services sustainable development investment project inter-american development bank (idb) potable water and sanitation pereira andean development corporation (caf) caf supports the sector through a usd 42.5 million loan to the cesar department in 2006 and a usd 58.1 million loan to the empresas aguas del magdalena approved in 2007. for information on caf projects in colombia see: caf colombia