The links that are given below will likely lead you to current data when an update is requested by the presence of a source web/CD icon next to a particular activity and/or project in the third edition of Calculus Concepts. You can also search on the item in question using an Internet search engine and find material that you can use.

Be aware that the data you find may or may not be the same as that presented in tables in the text. Some data are collected in a census of the entire population while other data are found by surveying a sample from the population. In addition, the manner in which data are collected may have changed over a period of several years (e.g., information for Hawaii would not have been included with United States data prior to 1959). Another reason for dissimilar data is that various sources may tabulate data differently. For example, one source listing the number of households with VCRs will include data for U.S. armed forces living abroad and another source may not.

Many of the references link you to the Statistical Abstract. You should choose the latest edition available and search the suggested section. Table headings are listed under the bookmarks tab once you access a particular section of the Abstract.

Page	Link(s)
131	http://www.factmonster.com/ipka/A0005061.html or http://www.infoplease.com (Search on "median age at first marriage".)
132	http://www.census.gov/statab/www/ (The section containing this information is Health and Nutrition.) or http://www.ers.usda.gov/publications/vgs/tables/percap.xls (Click on the Table "Percap1a" tab at the bottom of the page.)
135	http://www.census.gov/statab/www/ (The section containing information on delivery methods is Vital Statistics.) or http://www.cdc.gov/nchs/fastats/delivery.htm
135	http://www.gapinc.com/financmedia/AR_proxy.htm
147	http://www.census.gov/statab/www/ (The section containing this information is Population.)
148	http://www.census.gov/statab/www/ (The section containing this information is Law Enforcement, Courts, and Prison.)
226	http://www.census.gov/statab/www/ (The section containing this information is Labor Force, Employment, and Earnings.) or http://stats.bls.gov/news.release/empsit.t01.htm
226	http://www.ukspeedtraps.co.uk/ - Enter the site. In the left frame, scroll to BITS AND BOBS and choose STOPPING DISTANCES. or http://www.arachnoid.com/lutusp/auto.html or http://www2.netdoor.com/~wbaker/stopdist/stopdist_msf.html
295	http://www.census.gov/statab/www/ (The section containing this information is Vital Statistics.)
326	http://www.census.gov/statab/www/ (The section containing this information is Population..)
561	http://geography.about.com/library/misc/blequator.htm and http://aa.usno.navy.mil/data/docs/RS_OneDay.html or http://www.almanac.com/rise/rise.html
566	http://cdiac.esd.ornl.gov/ftp/maunaloa-co2/maunaloa.co2 (Click on Digital Data.)
581	http://www.almanac.com/rise/rise.html or http://aa.usno.navy.mil/data/docs/RS_OneDay.html Another suggestion is the web site for your local TV News/Weather channel(s).