Emission test

Hi

I went for new MOT. Car passed emission without problem but I compared new emission test with one from last year and I can see difference. Probably there is nothing wrong and I'll waste your time but on new mot I can see that HC is higher than in last year.also CO is slightly higher

Fast idle
New HC 30 old HC 4. - just thinking is it normal or I got to repair something before will be to late for CAT

CO is just 0.015 difference

Now idle speed
CO now shows 0.089 - is higher than during fast idle
CO last year 0.049 - same as fast idle

I know that these values are well below max limits but is there something I should take action or just don't care and enjoy driving?

O2 oxygen is spot on

Thank you