Donald Trump's first year in office saw significant shifts in several key areas, according to an analysis by the BBC's Analysis Editor, Ros Atkins. The analysis, focusing on numerical data, examined the Trump administration's performance across various sectors including the economy, immigration, and international relations.

Economically, the United States experienced continued growth, with the unemployment rate falling to levels not seen in decades. The stock market also saw substantial gains during this period. However, critics pointed to rising national debt, fueled in part by tax cuts enacted by the administration. These tax cuts, a central policy initiative, were projected to add trillions to the national debt over the next decade, according to the Congressional Budget Office.

Immigration policies underwent significant changes, marked by increased border enforcement and efforts to restrict immigration from several countries. The number of deportations saw an increase, and the administration initiated the construction of a wall along the U.S.-Mexico border, a key campaign promise. These policies drew both support from those who favored stricter immigration control and condemnation from human rights organizations.

In the realm of international relations, the U.S. withdrew from the Trans-Pacific Partnership trade agreement and the Paris Agreement on climate change. The administration also took a more confrontational stance towards countries like North Korea and Iran. These actions were praised by some who believed they strengthened American sovereignty and protected U.S. interests, while others warned of the potential for increased global instability and isolation.

The BBC analysis also highlighted shifts in regulatory policy, with the Trump administration rolling back numerous environmental regulations. Supporters argued that these changes would boost economic growth and reduce burdens on businesses, while opponents contended that they would harm the environment and public health.

The data presented by Atkins provided a quantitative overview of the Trump administration's first year, offering insights into the impact of its policies across various sectors. The analysis aimed to present a balanced view, acknowledging both the positive and negative consequences of the administration's actions, based on available data and expert opinions.