According to the data from the United States, the average life expectancy in 1900 was 46.3 years for men and 48.3 years for women. However, it is important to note that life expectancy has increased significantly since then. In 2000, the life expectancy for white men was 74.7 years, and for white women, it was 79.9 years. For Black men, the life expectancy was 68.2 years, and for Black women, it was 75.1 years. As of 2021, a baby born in the US has an estimated life expectancy of about 76 years. It is also worth noting that life expectancy has not always been on a steady upward trend, as there have been periods of decline due to various factors such as disease outbreaks and opioid-related deaths.