Death Rates per 1000			Corresponding Average Duration	Death Rates per 1000 from
Date	Maximum	Minimum	Average	of Life	Malaria	Typhoid
1810‑1819	55	30	42	24	...	...
1820‑1829	57	29	42	24	...	...
1830‑1839	180	25	59.7	17	...	...
1840‑1849	100	33	55.8	18	...	...
1850‑1859	112	38	60.7	16.5	...	...
1860‑1869	51	27	38.1	27	...	...
1870‑1879	48	24	31.8	31.5	...	...
1880‑1889	34	25	28.6	35	156	21
1890‑1899	31	23	27.2	36.7	104	39
1900‑1909	25.9*	20.8	22.6	44.2	26	38‡
1910‑1919	25.5†	18.1	20.6	48.5	7	21
1919	...	...	18.6	43.2	4	13
1920	...	...	17.75	56.3	1	7.5

* Figures given are for 1900.
‡ Includes deaths during 1918 grippe epidemic, except for which the death-rate would be 21.
† In 1900 drainage began to improve; in 1907 sewers operated; in 1909 water system inaugurated.

Kendall at http://penelope.uchicago.edu/Thayer/E/Gazetteer/Places/America/United_States/Louisiana/New_Orleans/_Texts/KENHNO/35*.html 

Prior to the passage of Act 192 of 1898, the Board of Health, domiciled in New Orleans, exercised dual functions as a state and city board, but under that act providing for municipal health boards, Dr. Quitman Kohnke became chairman of the first City Board of Health of New Orleans, bringing to the duties of that important position remarkable energy and resourcefulness.

Following the discovery of transmission of yellow fever by mosquitoes late in 1900, Doctor Kohnke, knowing New Orleans to be swarming with Stegomyia mosquitoes by which the disease is conveyed, made the most strenuous efforts to secure the adoption of an ordinance empowering him to attack the breeding places of those insects all over the city, but with discouraging results. It is generally conceded that if his earnest appeals had been heeded at that time, Louisiana might have been spared the outbreak of 1905, with its loss of life, disturbance of business and the toll of a quarter million dollars assessed by the Federal Government for the expense of fighting the fever.

After eight years of faithful service as city health officer, Doctor Kohnke, with his own health impaired, moved to Covington, Louisiana, in 1907, where he died suddenly in June, 1909.