capacity additions and total electricity investment by region in the Reference Scenario, 2003-30 3.6. Electricity network investment by region and decade in the Reference Scenario, 2003-30 3.7. Change in electricity consumption by sector in the Alternative Policy Scenario compared with the Reference Scenario, 2030 3.8. Change in electricity generation by fuel in the Alternative Policy Scenario compared with the Reference Scenario 3.9. Electricity sector investment by region in the Alternative Policy Scenario, 2003-30 3.10. Share of countries with private participation in the electricity sector by developing region, 2004 (% of sample) 4.1. Relevant elasticity relationships 4.2. (Fay-Yepes) Road infrastructure estimates to 2010 4.3. Vehicle ownership forecast 4.4. Road use forecast 4.5. Road new construction requirements 4.6. Rail new construction requirements 4.7. Relevant freight elasticity relationships 4.8. Relevant passenger elasticity relationships 5.1. Regional availability of water resources 5.2. Percentage of population served by water supply and sanitation services (2002) 5.3. Percentage of households with in-house access to safe drinking water and reliable sanitation 5.4. Proportion of households in major cities connected to mains water and sewers 5.5. Benefit/cost ratio for interventions in developing regions and Eurasia 5.6. Costs of water supply and wastewater infrastructure for centralised systems 5.7. Global water use 5.8. Water supply coverage 1994 5.9. Groundwater extraction in selected regions INFRASTRUCTURE TO 2030: TELECOM, LAND TRANSPORT, WATER AND ELECTRICITY - ISBN 92-64-02398-4 © OECD 2006 TABLE OF CONTENTS 5.10. Estimates of average annual costs for investment in water systems to 2019 5.11. Expenditure on UK water services 5.12. Water supply and sanitation estimates for EECCA countries 5.13. Estimated annual investment needs in India 5.14. Expenditure on water and sanitation as a percentage of GDP 5.15. Investment and current expenditure on wastewater pollution abatement and control, selec