Claiming work experience order

In my EE profile I added 10 years of work experience with different companies in India and USA. The recent 2 and half years are with my current employer. Considering my score is low (449), I’m not expecting ITA anytime soon and would have 3 years of experience by August.

If I get my ITA after August, is it enough if I just supply the experience letter with Roles and responsibilities (matching NOC 2174) and salary information of my recent 3 years or do I need to provide similar information for all 10 years of my work experience.

Thank you!