for improvements ln water gupPly but, as the percentages of population !'ith adequate sanitation in 1980 were much looer than those Hith safe r,rater, Ehe percentages still unserveal in 199q and 2000 ttill be much higher. Under the lower-growth scenario, the percentage of the populatlon with adequate Sanitatlon ln the Low-income countries would incresae froE 13 per cent in 1980 to only 1? per cent in 1990 and 23 per cent in 20001 Ehe improvement in the least developed countries would be even less, froo 15 per cent in I98O to 19 Per cent ln 2000 (see table 44). In the upper-tncome oil-importing countrieE, it sould increase fron 48 per cent in 1980 to only 52 per cent in 1990 and 55 Per cent in 2000' Under the higher-gro'tth scenario' in contrasc, the lolr-lncome countries uould make greater progress, reaching 19 per cent in 1990 and 30 per cent in 2000, because of the rore rapj.d increase in total investmen!. The effect of higher grolrth teould be more moderate in the oil-exportlng and upper-incoRe oil-irnporting countries, raising tbe service coverage about I per cent above the levels projected for 1990 with lot., groeth' and 4 to 5 per cent above those projected for the year 2000'A/40/5l9 English Page123 Table44.Percentage ofpopulation withadequate sanitation indeveloping countries withmarketeconomies, 1980-2000y 1980b/ 1990c/ 2000c/,Country group Urban Rural Total Lower Higher Lower Higher Oil-exporting 52.9 17.5 34.6 44.2 44.9 53.5 57.8 Oil-importing Upper-income 60.2 35.3 48.4 51.9 52.9 56.4 61.4 Low-income 32.7 6.7 12.6 17.4 18.9 22.8 29.6 Leastdeveloped 33.9 12.9 15.8 16.1 38.1 19.3 30.2 Total,oil-expor ting andoil-importing 41.3 14.1 23.1 28.3 29.5 34.0 40.0 Source: Department ofInternational Economic andSOcialAffairs oftheunited Nations Secretariat. yThepercentages foreachgrouparetheaverage ofthepercentages for eachcountry inthegroup,weighted bythecountry's population (intheyearto whichthe·percentage applies). 21Basedoncountry figures indocuments A/35/367, annexV,and A/40(108-E/1985/49, annex11. £!Projections basedonlower-growth andhigher-growth scenarios (see para.273).
**Analysis**
The text discusses the percentage of population with adequate sanitation in developing countries with market economies, highlighting the differences between low-income and upper-income countries, as well as the impact of growth scenarios on sanitation coverage. The focus is on the provision of basic infrastructure, which is essential for human health and well-being.

**Category**
Health, Economic development