Campsite Occupancy Survey National Data by categories. Supply Estimated number of vacancies by category and months. Units: number ;January;February;March;April;May;June;July;August;September;October;November;December; Total;259,822;284,435;445,861;557,469;616,982;710,276;755,691;756,097;658,984;401,406;300,907;268,335; Luxury and cat. 1;110,359;119,895;184,407;241,891;274,492;313,970;323,234;322,959;281,286;165,535;124,861;111,001; cat. 2;132,906;144,198;223,357;270,566;292,560;332,334;357,758;358,195;315,466;201,708;153,361;137,820; cat. 3;16,557;20,342;38,097;45,012;49,931;63,972;74,699;74,943;62,232;34,163;22,685;19,514; Notes: Source: National Statistics Institute