Analysis: The crude birth rate remained at 11 live births per 1,000 inhabitants, which is declining. This low CBR reflects a significant decline over the past few decades which attributed to factors such as increased access to contraception or changing societal norms around marriage and family, and economic considerations. The trend shows a shift toward later-life childbirth and smaller family sizes.

Analysis: The current fertility rate for U.S. in 2024 is 1.62 births per woman, a 0.11% increase from 2023. Factors influencing this decline compared to earlier years include women's increasing participation in the workforce which might lead economic instability, and shifting cultural attitudes toward family and parenting. As a result, many couples are choosing to have fewer children or delay childbirth.

Analysis: The natural increase rate of america is 0.4% each year, thus its population doubling time is around 174 years. With a low growth rate (around 0.4% per year), the population doubling time is also extending. This stability contrasts with earlier periods of rapid growth and suggests a transition towards more "mature" demographics.

Analysis: The mortality rate of the united states is 9.226 deaths per 1000 people. The mortality rate reflects development in healthcare and living standards. However, it is also impacted by issues such as the opioid crisis or obesity-related diseases, and healthcare disparities. The U.S. mortality rate is higher than in many other developed countries which might be because of these health challenges.

Analysis: The current life expectancy for U.S. in 2024 is 79.25 years, a 0.18% increase from 2023. Life expectancy has generally increased over the past century but has stagnated or slightly declined in recent years due to factors like the COVID 19 epidemic and rising chronic diseases. There are also differences based on cultural groups and areas people live in (urban or rural) which affects the healthcare access people have

Analysis: The rate of natural increase of united states in 2024 is about 0.4%. The low rate of natural increase (the difference between births and deaths) reflects the combination of low birth rates and rising mortality rates in certain populations. but immigration also remains an important "push" of population growth which somehow offsets natural decline.

analysis: from the rate of natural increase, birth rate and death rate, we can see that while both birth and death rate maintains a low amount, the rate of natural increase is declining while its still positive, demonstrating a slow increase. Due to the advancements of medical technology and health care, the life expectancy is longer. In this stage, the rate of natural increase is minimal, with population growth largely driven by immigration rather than high birth rates. Urbanization plays a critical role as well, with more individuals residing in cities where the cost of living is higher, leading families to opt for fewer children. proving that the current stage of USA in the DTM model is the 4th stage, where both birth and deaths rates are low and population is in a stable and slow increase.

Analysis: The US population policy is largely focused on the immigration policies The U.S. has established quotas and pathways for family reunification, employment-based immigration, and humanitarian admissions (e.g., refugees), to gain more population to engage in the workforce.