Given the document below, determine if the summary is factually consistent with the document.

Document: According to an index that tracks seasonal food, the price of Christmas dinner is now at its lowest since it started in 2009. A separate calculation suggests that Christmas trees, too, are getting cheaper, costing just an eighth of what they did back in 1975. One reason for falling prices may be the arrival of low-cost supermarkets. However, the increasing cost of importing food may mean that Christmas 2016 will mark the low point for prices. The Christmas dinner index - compiled by NAME_1 Housekeeping magazine - suggests that the 11 ingredients necessary are now 10.8% cheaper than they were in 2009. Buying everything from the turkey to Christmas pudding is likely to cost £2.48 a head this year, if you bought each in the cheapest supermarket. In 2009, the equivalent cost was £2.78, according to the index. Is Christmas getting cheaper? Separate research that goes back as far as

Summary: 1. In 1975, the equivalent cost was £2.78, according to the index.

Options: "Yes" or "No"

Answer: