( CNN ) -- With Christmas comes Christmas trivia . Here 's a look at the holiday by the numbers : . 30.8 million - Real Christmas trees purchased in the United States in 2011 . 16 - Percentage of real trees sold that were `` cut-your own . '' 4.1 % - Expected amount of increased holiday sales in the United States in 2012 over last year , according to the National Retail Federation . 586.1 billion - Amount of expected total sales , if they do increase by 4.1 % . 62 - Percentage of Americans who attend religious services on Christmas Eve or Christmas Day . More than 70 million - Poinsettia plants sold in the United States each year , within about a six-week period . 2.7 million - Candy canes manufactured each day by the Spangler Candy Co. 5,083,000 miles per hour - Average speed Santa 's sleigh must travel to be able to deliver presents all over the world in one night . $ 107,000 - This year 's cost of all of the gifts in `` The Twelve Days of Christmas '' song . 364 - Total number of Christmas gifts the `` true love '' gives . 27 - Percentage of people surveyed in 2009 who said they wrap their gifts to others a day or two before Christmas . 4 inches - Real-life height of the young Rudolph figure used in the stop-motion animated TV holiday classic , `` Rudolph the Red-Nosed Reindeer . '' 21 % - Expected increase in employment for dentists from 2010 to 2020 . That 's good news for Hermey , Rudolph 's friend who wants to be a dentist instead of making toys . 74 - Percentage of adults who said the female head of the household was most likely to be the one to wrap all of the family 's gifts . 90 % - Estimated decline in the next 50 years of the availability of frankincense , an aromatic resin used to make perfumes . Gold , frankincense and myrrh were the three gifts the Magi gave to Jesus . 3 years - Shelf life of a store-bought Christmas fruitcake ( if it 's refrigerated ) .
Holiday sales are expected to be up 50 % over last year . 80 % of Americans attend a religious service on Thanksgiving or Christmas Day . The availability of holidays is expected to decline by 90 % in the next 50 years .