The percentage of undergraduates receiving financial aid increased as the price of attendance rose, while the percentage receiving aid decreased as family income rose. These two patterns reflect the need analysis formula used to award financial aid. With the exception of some merit-based scholarships and some loan programs (notably, federal unsubsidized Stafford and PLUS loans), most financial aid programs are need based. Low-income students who have limited resources will usually qualify for need-based aid at any price of attendance; high-income students will only qualify for need-based aid if they are attending institutions with a high price of attendance. About three-fourths of all low-income dependent undergraduates (those with a family income of less than $30,000) received financial aid in 1999–2000, compared with about one-half (48 percent) of high-income dependent undergraduates (those with a family income of more than $80,000).