Table 3

Surgical interventions used over study period

Time periodPoudrage onlyBulla resectionBulla suturedBulla ligationElectro-coagulationLobectomyPoudrage only (no bullae)Total
2000–2002561076677290335
2003–2005107457648185326
2006–2008852959516191286
2009–201266172645210140468