A. Approximately 300,000 knee replacements are performed each year in the United States. and it said that 90% of the people who had a total knee replacement report an improvement in their function.i searched the CDC statistics for failure of the surgery and couldn't find any info about it.. Approximately 300,000 knee replacements are performed each year in the United States. and it said that 90% of the people who had a total knee replacement report an improvement in their function.
A â³work spouseâ³ is also referred to as â³ workplace spouse â³ or â³ office husband â³.
1 The ex-spouse is unmarried; 2  The ex-spouse is age 62 or older; 3  The benefit that the ex-spouse is entitled to receive based on her own work is less than the benefit she would receive based on the previous spouse's work; and. 4  Your boyfriend is entitled to Social Security retirement or disability benefits.