BOSTON ( TheStreet) -- Back in 1901, under the McKinley administration, the national debt amounted to $28 for every man, woman and child. It's ballooned to more than $13.4 trillion -- as of last week, $43,507 for every resident of the U.S. To indulge a flight of fancy, if global bill collectors came knocking at your door, to whom, and for what, would you owe money? Government debt held by the public totaled about $7.6 trillion at the end of Fiscal Year 2009 and is in the form of Treasury securities such as bills, notes and bonds. The "public" holding this debt includes individuals, corporations, state and local governments, Federal Reserve banks and foreign governments. There's also nearly $4.4 trillion in intragovernmental debt, when one part of the government borrows from another. This includes debt held by government funds, including the Social Security ($2.5 trillion in FY2009) and Medicare ($372 billion in FY2009) trust funds. The sum of debt held by the public and intragovernmental debt equals gross federal debt, subject to a statutory ceiling. Congress, for example, raised the debt limit twice during FY2009 -- from $10.6 trillion to $11.3 trillion in October 2008, then and again to $12.1 trillion in February 2009 with the passage of the stimulus act. In December, the limit went up to $12.4 trillion and in February was raised again to $14.3 trillion. Debt held by the public totals $8.9 trillion; intragovernmental holdings amount to more than $4.5 trillion. If, hypothetically, we all were forced to pay up, the public share of the debt is where those obligations would lie. But as you write out those checks, make sure to have a lot of air-mail stamps. Major foreign holders of Treasury securities, through June, include mainland China ($843.7 billion); Japan ($803.6 billion); the United Kingdom ($362.2 billion); a grouping classified as "oil exporters" that includes Ecuador, Venezuela, Indonesia, Bahrain, Iran, Iraq, Kuwait, Oman, Qatar, Saudi Arabia, the United Arab Emirates, Algeria, Gabon, Libya and Nigeria ($223 billion); "Caribbean banking centers" that include the Bahamas, Bermuda, Cayman Islands, Netherlands Antilles and Panama ($165.2 billion); Brazil ($158.4 billion); Hong Kong ($141 billion) Taiwan ($128.6 billion); Russia ($123.4 billion); Switzerland ($100.1 billion); Luxembourg ($97.5); Canada ( $94 billion); and Germany ($53.5 billion). And the list goes on. The total: $4 trillion.