According to this table online from [perhaps] credible sources, the actuarial life expectancy for white males in the U.S. from 1900 – 1902 was 9.03%.
For white females from 1900 – 1902 it was 9.59%.
https://www.infoplease.com/us/health-statistics/life-expectancy-age-1850-2011
That 9% number for men held steady (< 1% increase), and rose to a range of 10.07% – 11.35% from 1949 – 1981.
The corresponding data for women was better, rising to 14.89% by 1979 – 1981.
Assuming American westerners in 1899 were inclined not to vaccinate minors – those ≤ 21 years of age – then it reasonably implies that a statistically significant # [ ~ 9%] of adult citizens in that region – age ≥ 21 years old – were also vaccinated that year, and survived to at least age 71.
Can't determine what fraction of the 9% 1899ers may have been vaccinated.
Don't have the data – or time to research it now – on the smallpox vaccine[s] used then.
"Lies, damn, lies, statistics."
Life expectancy is measured in years, not percentages. Please explain this number.