"National population data for the years 1900 to 1949 exclude the population residing in Alaska and Hawaii. National population data for the years 1940 to 1979 cover the resident population plus Armed Forces overseas. National population data for all other years cover only the resident population. Estimates of the population including Armed Forces overseas are as follows:

1919 105,063,000
1918 104,550,000
1917 103,414,000

National population data for the years 1900 to 1929 are only available rounded to the nearest thousand.

Data for this table comes from Current Population Reports, Series P-25, Nos. 311, 917, 1095, and our National Population Estimates web page."

"Both unweighted and weighted (predicted) provisional counts are provided. Weighting of provisional counts is done to account for potential underreporting in the most recent weeks. However, data for the most recent week(s) are still likely to be incomplete. Only about 60% of deaths are reported within 10 days of the date of death, and there is considerable variation by jurisdiction and age. The completeness of provisional data varies by cause of death and by age group. However, the weights applied do not account for this variability. Therefore, the predicted numbers of deaths may be too low for some age groups and causes of death. For example, provisional data on deaths among younger age groups is typically less complete than among older age groups. Predicted counts may therefore be too low among the younger age groups. More detail about the methods, weighting, data, and limitations can be found in the Technical Notes."

The estimated mortality rate per hundred thousand was used here to calculate the death counts in these years. The rates appeared to make more sense and were closer to the same ballpark as the older numbers I found for Maryland.

"Many of the crude rates have been revised from the original publication to reflect the modification of population data after a later census was conducted."