Every 3 months - 139 (4.8%) Every 6 months - 370 (12.7%) Every 12 months - 584 (20%) Every 18 months - 378 (13%) Every 2 years - 410 (14.1%) Every 3 years - 262 (9%) Whenever I have extra money, I upgrade my PC - 444 (15.2%) I upgrade PC very rarely, prefer to get a new one - 232 (8%) I rarely upgrade or buy new PCs - 80 (2.7%)