<Tr> <Td> Soviet Union </Td> <Td> 50.0% (1980) </Td> <Td> n / a </Td> <Td> n / a </Td> <Td> n / a </Td> <Td> n / a </Td> </Tr> <Tr> <Td> Yugoslavia </Td> <Td> 69.8% (1981) </Td> <Td> 93.2% </Td> <Td> 84.2% </Td> <Td> 89.7% </Td> <Td> 83.1% </Td> </Tr> <Table> Housing quality in Hungary (1949--1990) <Tr> <Th> Year </Th> <Th> Houses / flats total </Th> <Th> With piped water </Th> <Th> With sewage disposal </Th> <Th> With inside toilet </Th> <Th> With piped gas </Th> </Tr> <Tr> <Td> 1949 </Td> <Td> 2,466,514 </Td> <Td> 420,644 (17.1%) </Td> <Td> - </Td> <Td> 306,998 (12.5%) </Td> <Td> 174,186 (7.1%) </Td> </Tr> <Tr> <Td> 1960 </Td> <Td> 2,757,625 </Td> <Td> 620,600 (22.5%) </Td> <Td> - </Td> <Td> 440,737 (16%) </Td> <Td> 373,124 (13.5%) </Td> </Tr> <Tr> <Td> 1970 </Td> <Td> 3,118,096 </Td> <Td> 1,370,609 (44%) </Td> <Td> 1,167,055 (37.4%) </Td> <Td> 838,626 (26.9%) </Td> <Td> 1,571,691 (50.4%) </Td> </Tr> <Tr> <Td> 1980 </Td> <Td> 3,542,418 </Td> <Td> 2,268,014 (64%) </Td> <Td> 2,367,274 (66.8%) </Td> <Td> 1,859,677 (52.5%) </Td> <Td> 2,682,143 (75.7%) </Td> </Tr> <Tr> <Td> </Td> <Td> 3,853,288 </Td> <Td> 3,209,930 (83.3%) </Td> <Td> 3,228,257 (83.8%) </Td> <Td> 2,853,834 (74%) </Td> <Td> 3,274,514 (85%) </Td> </Tr> </Table> <Tr> <Th> Year </Th> <Th> Houses / flats total </Th> <Th> With piped water </Th> <Th> With sewage disposal </Th> <Th> With inside toilet </Th> <Th> With piped gas </Th> </Tr>

Who were the countries in the warsaw pact