They probably do by days, the total sum of the days, to see the division how many years meant. But maybe they have to draw per lines, that is what you asking me?

One year its 365 days, from Jan 1st 12 oclock at night = hour zero to the Dec 31th that midnight the 11:59:59 second, one more second, that is totally full 365 days = 364 days 23 hours 59 mins 59 second to adding 1 second becoming the 364 days 24 hours 0 mins 0 second. = 365 days 0 hour, 0 mins, 0 second.

That is not what I always say?