The notion of time lag on the death count corresponds to the fact that not all reported deaths are counted instantaneously.
The data we propose are derived from death certificates.
There are several reasons for this:
The time it takes for the human to complete the death certificate
The case of missing persons
Some cases need to be settled by a court
Thus, death data isnever frozen.
In December, there are many deaths that are counted in the following year given the end of the year, there are about 25% of deaths not counted over the year. In November, however, this rate drops to 1%.
In practical terms, you have to wait 2 months for the data to stop changing significantly.