Based on the search function response, it appears that approximately 2% of the U.S. population holds a doctoral degree. More specifically, the data indicates that 3.6% of males and 2.9% of females aged 18 and older possess a doctorate or professional degree level of attainment. This represents a small yet significant portion of the adult population engaged in extensive higher education.

As for the doctoral research pursuit itself, the success rate of individuals who begin doctoral studies is often estimated at around 50%. However, it's important to note that this figure can vary widely. Some candidates may take many years to complete their studies or may not finish at all for various reasons.

For additional information, you can explore these links:

1. Detailed statistics on educational attainment, including doctoral degrees: Education Data.
2. A blog post that provides insights on doctoral degree statistics: National University.
3. A discussion regarding the challenges of completing doctoral studies: Quora.

In summary, while about 2% of Americans have earned a doctoral degree, the journey through doctoral education is complex, with completion rates around 50%, underscoring the challenges faced by many in this academic pursuit.

Sources

Educational Attainment Statistics [2025]: Levels by Demographic[PDF] Survey of Earned Doctorates 2025 INFORMATION ONLYPercentage Of Adults With College Degree Hits New High, Finds ...67 Doctorate Degree Statistics and Facts | National UniversityPhD USA? Worth it or not in 2025 onwards... - RedditEducational attainment in the United States - WikipediaWhat percentage of individuals who pursue doctoral studies actually ...

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