4.60% had someone living alone who was 65 years of age or older. The average household size was 2.71, and the average family size was 3.18. In the county, the population was spread out, with 28.10% under the age of 18, 6.30% from 18 to 24, 34.40% from 25 to 44, 23.80% from 45 to 64, and 7.50% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 96.60 males. For every 100 females age 18 and over, there were 92.90 males. The median income for a household in the county was $101,003, and the median income for a family was $117,186 in 2009. The per capita income was $44,120. About 2.70% of families and 4.00% of the population were below the poverty line. Education The Howard County Public School System, the school district for the entire county, manages 71 schools and serves approximately 49,000 students. The graduation rate from this school district was 90.4% in 2009, and the county's schools are ranked among the best in the state. Student test scores consistently top the list for all Maryland school districts. Howard High School is currently the largest school in the county with over 1,700 students. Library In 2013 Howard County Library System was selected as the Library of the Year by Library Journal and cited by editor-at-large, John N. Berry, as "a 21st-century library model, with a position, doctrine, purpose, and curriculum worthy of study and consideration by every library in America, if not the world." In 2015 the Howard County Library System was designated the top Star Library in its class. Under the library's sponsorship, a campaign called "Choose Civility" started in Howard County in 2006. According to its website, "Choose Civility is an ongoing community-wide initiative, led by Howard County Library, to position Howard County as a model of civility. The project intends to enhance respect, empathy, consideration and tolerance in Howard County." The campaign's distinctive green bumper stickers are often seen in Howard County and neighboring areas. Politics and government Howard County has voted for the Democratic presidential candidate in every election from 1992 on, and has become increasingly Democratic in subsequent presidential elections. In the 2020 presidential election, Democratic Party candidate Joe Biden received the highest percentage of Howard County's votes of any presidential candidate in the history of the county. The less-populated western and