The United States reached 69.6% of adults 18+ having at least one dose of the COVID-19 vaccine dose as of July 29th, 2021. 60.4% of adults are fully vaccinated, according to the CDC COVID Data Tracker, shown in this CDC table:
The number of new vaccinations is increasing. This Washington Post graph, drawn from CDC data, indicates that about 857,000 vaccine doses were administered on July 29th, the highest number since July 3rd https://wapo.st/3rMRDKS At this rate, the U.S. should reach 70% of adults with at least one dose within the next few days. It is necessary to link to the WP article and hover your cursor over the graph to see the daily numbers.
Tracking the vaccinations every day, the US is increasing the percentage of adults with at least one dose at either one-tenth of one percent, or two-tenths of one percent, every day. About 45% of 12-17 year olds have at least one dose.