From the US Department of Homeland Security: "Lawful permanent residents (LPRs) are foreign nationals who have been granted the right to reside permanently in the United States. LPRs are often referred to simply as "immigrants," but they are also known as "permanent resident aliens" and "green card holders."
From the US Department of Homeland Security: "Naturalized citizens are foreign nationals who have become citizens of the United States after fulfilling requirements established by Congress in the Immigration and Nationality Act."
'...A database of statistics on the social, political and economic conditions of the United States. Can be searched by keyword/topic and includes individually indexed tables (with attached spreadsheets)...'
Contains time series data for nearly 200 social, business, economic, health, education, environmental and government measures for all 50 states and an additional 80 measures specific to California. Data may be available annually, quarterly or monthly for the US, individual states, counties, cities and zip codes.