The U.S. Supreme Court upheld the Patient Protection and Affordable Care Act on Thursday . The landmark 5-4 decision will dictate the way health care is administered to millions of Americans . Here 's a look at health care in the United States by the numbers , including the populations that could be most affected by the decision on what has come to be known as `` Obamacare . '' Obama : Health care ruling a victory for all Americans . 49.9 million -- The number of uninsured Americans in 2010 . That 's 16.3 % of the total population . 18.4 % -- Percentage of uninsured Americans younger than 65 in 2010 . 28.4 % -- The percentage of Americans 25 to 34 without insurance . 7.3 million -- The number of children in the United States without health insurance , 9.8 % of all children in the country . 15.4 % - The percentage of children living in poverty who are also uninsured . Ruling plays into campaign narrative for both sides . 26.9 % -- Percentage of people earning less than $ 25,000 a year who are also uninsured . 256.2 million -- The number of Americans who were insured in 2010 . 195.9 million -- The number of Americans with private health insurance in 2010 , 64 % of the total population . What the health care ruling means to you . 169.3 million -- The number of Americans who get their insurance through the workplace . 95 million -- Number of people in the United States covered by government health insurance , 31 % of the population . 44.3 million -- Number of Americans receiving Medicare coverage in 2010 . 48.6 million -- The number of Americans covered by Medicaid in 2010 . $ 940 billion -- The amount of money the Congressional Budget Office estimates it will cost to provide the expanded insurance coverage over 10 years . $ 143 billion -- The amount by which the plan could reduce the deficit over the first 10 years . And over the following decade , the CBO projected , health reform could reduce the deficit by more than $ 1 trillion , although the agency stressed such long-term projections are highly uncertain . Timeline of the health care law . 2.35 % -- The tax rate high-income individuals would pay into Medicare , up from 1.45 % . High-income is defined as individuals making more than $ 200,000 ( $ 250,000 for couples filing jointly ) . 2014 -- The year that people who do n't buy insurance will be penalized $ 95 or up to 1 % in income . 19.1 % - Percentage of people living in the South who are uninsured , the highest percentage of any region . 24.6 % - The percentage of uninsured people in Texas , the highest of any state . 5.6 % - The percentage of uninsured people in Massachusetts , the lowest of any state . Breaking down the court 's decision . Opinion : Are voters ready to move on ? Photos : Who is John Roberts ? Overheard on CNN.com : Health care law a 'necessary evil '
49.9 million -- The percentage of uninsured Americans in 2010 . 15.4 % - The percentage of children living in poverty who are also uninsured . 1 % -- Number of people in the U.S. covered by private health insurance .