This has been done in 1976,1982-83,1990-91,1999,2006-07 with a sample of approximately 7,000 each time. These surveys provide participation data for a small selection of activities over time, i.e. walking, forest hiking, gardening, outdoor swimming, boating, fishing, backpacking and hunting. A new survey is planned for year 2013-14. The basic idea was to suggest a longitudinal program which covers data at different spatial levels to meet the needs of different stakeholders (Yuan and Fredman 2008]. The program has so far not been implemented.