Survey on Households and the Environment Classification by characteristics of the reference person Percentage of dwellings whose residents use specific products, by level of studies completed by the reference person and frequency of use Units: % over the total number of dwellings Use throwaway products Use throwaway products fairly often Use recycled paper Use recycled paper fairly often Use returnable containers Use returnable containers fairly often Use rechargable batteries Use rechargable batteries fairly often TOTAL 89.5 57.2 33.4 13.5 27.8 12.6 50.5 29.5 Without studies 79.9 43.2 14.1 4.8 20.8 8.6 22.1 9.1 Primary education or the equivalent 89.1 53.7 27.4 9.8 25.7 10.3 41.6 21.0 Stage one secondary education 92.2 65.0 31.1 11.6 26.2 12.4 53.9 33.6 Upper-secondary education 91.6 60.3 41.5 17.2 32.6 15.9 59.2 35.1 Intermediate level-professional education 92.4 63.3 43.1 19.2 33.3 15.1 66.9 41.4 Higher level -professional education 93.1 62.7 40.9 15.1 32.8 15.6 69.0 43.8 1st cycle university studies 92.1 63.1 44.2 19.7 29.0 14.9 63.1 41.4 2nd or 3rd cycle university studies 93.1 62.9 52.9 25.0 32.5 16.6 72.1 48.0 Does not know/ Does not answer 100.0 74.8 27.9 27.9 27.9 27.9 96.7 96.7 Notes: Source: National Statistics Institute