September 2020 Summary Statistics

Like I did with the months of March, April, May, June, July, and August, I will present some summary statistics which can explain the trends that we observed during the month of September 2020.


Total Case Growth
Total cases on 31 August: 110,877
Total cases in 30 September: 125,358
Total case increase: 14,481

Smallest daily case increase: 314 (28 September)
Largest daily case increase: 651 (11 September)

Median daily growth rate: 0.43%
Average daily growth rate: 0.41%


 

Total Fatality Growth
Total fatalities on 31 August: 3,544
Total fatalities in 30 September: 3,725
Total fatality increase: 181

Smallest daily fatality increase: 0 (14 and 27 September)
Largest daily fatality increase: 12 (16 September)

Median daily growth rate: 0.17%
Average daily growth rate: 0.17%





Note: This will be the last monthly summary where I make these daily percentage increase charts for both cases and fatalities. The percentages themselves have gotten so low (as I mentioned in the daily update for 28 September), and the fluctuation is so marginal (tenths of a percentage point at this juncture), that I see no particular value in it.

State-Level Shares for September 2020

Average & median share of regional cases for Maryland: 47%
Average & median share of regional fatalities for Maryland: 52%
Maryland share of DC metropolitan-area population: 42%

Average & median share of regional cases for DC: 12%
Average & median share of regional fatalities for DC: 17%
DC share of DC metropolitan-area population: 13%

Average & median share of regional cases for Virginia: 41%
Average & median share of regional fatalities for Virginia: 31%
Virginia share of DC metropolitan-area population: 45%







Population-adjusted statistics, per 1,000 of population (data as of 30 September)
MD cases: 25.041
MD fatalities: 0.804

DC cases: 22.027
DC fatalities: 0.895

VA cases: 20.322
VA fatalities: 0.471






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