The Social Security Administration is expected to announce on Friday that retirees and disabled Americans will see no increase in benefits for 2011, the second straight year without an increase.

A look at who gets benefits:

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_ Total beneficiaries: 58.7 million.

_ Social Security recipients: 53.5 million

_ Supplemental Security Income recipients: 7.9 million.

_ People who get both Social Security and SSI: 2.7 million.

_ Average monthly Social Security payment: $1,072.

_ Average monthly SSI payment: $499.

_ Social Security is the primary source of income for 64 percent of recipients.

_ One-third of recipients rely on Social Security for at least 90 percent of their income.

_ Early retirement age: 62.

_ Full retirement age: 66, rising to 67 for people born after 1959.

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Source: Social Security Administration.