Proton's performance from 2006 to 2011 showed no improvement in production and sales volume compared to 1996 to 2005, despite the introduction of new models and increased overheads. The company's most productive period was during 1996 to 2005, when it produced over 3.6 million vehicles, with key successful models including the Saga and Persona. Financial metrics, such as profit before tax and turnover, deteriorated in the later period, indicating a disconnect between executive remuneration and company performance.