Campsite Occupancy Survey National Data. Demand Overnight stays of travellers by category of establishment and months. Units: number ;Total;January;February;March;April;May;June;July;August;September;October;November;December; Total;22,153,612;418,039;411,693;543,427;1,260,437;927,410;1,464,559;5,407,586;8,644,425;1,701,751;631,159;344,942;398,179; Luxury and cat. 1;8,987,498;134,557;131,818;199,709;528,776;398,634;626,784;2,289,162;3,426,700;719,339;258,343;130,959;142,712; cat. 2;11,370,863;265,974;263,048;316,446;634,154;455,985;703,923;2,674,674;4,457,472;835,825;331,341;196,031;235,986; cat. 3;1,795,250;17,507;16,826;27,271;97,506;72,790;133,852;443,749;760,252;146,587;41,474;17,952;19,479; Notes: Source: National Statistics Institute