ambitious National Water Sector Development Strategy that promotes Integrated Water Resources Management and the development of urban and rural water supply was adopted in 2006. Decentralisation has meant that responsibility for water and sanitation service provision has shifted to local government authorities and is carried out by 20 urban utilities and about 100 district utilities, as well as by Community Owned Water Supply Organisations in rural areas. These reforms have been backed by a significant increase of the budget starting in 2006, when the water sector was included among the priority sectors of the National Strategy for Growth and Reduction of Poverty. The Tanzanian water sector remains heavily dependent on external donors, with 88 per cent of the available funds being provided by external donor organisations. Results have been mixed. For example, a report by Deutsche Gesellschaft für Internationale Zusammenarbeit noted that "despite heavy investments brought in by the World Bank and the European Union, (the utility serving Dar es Salaam) has remained one of the worst performing water entities in Tanzania." Economic statistics controversy Two articles in the Economist in July 2020 raised doubts about official claims of economic growth: "If Tanzania's economy grew by almost 7% in the fiscal year to the end of June 2019, why did tax revenue fall by 1%? And why has bank lending to companies slumped? Private data are bad, too. In 2019 sales at the biggest brewer fell by 5%. Sales of cement by the two biggest producers were almost flat. None of these things is likely if growth is storming ahead. The discrepancies are so large that it is hard to avoid the conclusion that the government is lying." Tim Staermose, a proponent of African investment, took issue with these data: "Some of these statements by The Economist, based on the evidence I have gathered from primary sources – namely, the statutory financial reports that listed companies in Tanzania are legally obligated to release – are simply not true. Bank lending to companies as far as I can see has not, 'slumped.' The two biggest banks in Tanzania, which between them account for approximately 40% of the banking sector, both reported strong loan growth in 2019. ... As for cement sales being 'almost flat,' again, this is total nonsense. ... In 2019 Twiga sold 6% more cement by volume than it did in 2018. In the first six months of 2020,