In my country HR specifically asks for 'x' years of experience with 'Y'. I don't have it in my resume, I just spread the skills between an "Advanced" and "Prof

In my country HR specifically asks for 'x' years of experience with 'Y'. I don't have it in my resume, I just spread the skills between an "Advanced" and "Proficient" subsection, but I've been asked at least once why I don't specify the number of years with each technology.