Supporters of the health care legislation celebrate after the Supreme Court upheld the constitutionality of the Patient Protection and Affordable Care Act in a 5-4 ruling Thursday, June 28.
(CNN) -- 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.
Short-term loss for conservatives?
Obama: It's a victory for the people
Romney: I'll do what justices didn't
Ruling on individual mandate explained
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 don'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?
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Journalists and supporters and protesters of the health care law gather outside the Supreme Court after the justices ruled in favor of its constitutionality in a narrow decision.
Protesters against the health care law rally outside the Supreme Court before the justices issue their ruling Thursday.
Reporters and camera crews begin waiting early Thursday outside the Supreme Court in anticipation of the court's health care ruling.
President Barack Obama signs the health care legislation in a March 23, 2010, ceremony with Democrats in the White House East Room. The law, which critics dubbed Obamacare, is Obama's signature legislation.
The constitutionality of the 2,409-page act was challenged by 26 states. The most controversial aspect of the law -- the "individual mandate" -- would require individuals not covered by insurance via their employer or the government to purchase and maintain minimal health insurance or pay a penalty.
The Supreme Court held three days of politically charged hearings in March on the Affordable Care Act.
Opponents of Obama's health care legislation protest in front of the Supreme Court on March 28. Critics argued the law's requirement that most Americans have health insurance or pay a fine was an unconstitutional intrusion on individual freedom.
Advocates for universal, government-financed health care carry signs one month before the health care overhaul was signed into law.
Two years after Obama signed the health care legislation, the Supreme Court took up the historic test of whether it's constitutional.
The Rev. Patrick Mahoney leads demonstrators in prayer outside the Supreme Court on Monday, June 25, as they await the court's ruling.
The high court upheld the law's central provision -- a requirement that all people have health insurance. The decision will have an immediate and long-term impact on all Americans, both in how they get medicine and health care.
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