Update usps.json

usps.json

@@ -13,5 +13,6 @@
   "The USPS was originally envisioned primarily as a way to deliver news and was widely adopted by newspapers of the 18th and early 19th century. But eventually people realized that just anyone could send mail, so they started writing each other letters.",
   "US postal stamps were introduced in 1847. Before that, letters were brought the post office where the postmaster would determine the postage and write it in the corner of the letter.",
   "During the construction of the Transcontinental Railroad, USPS delivered mail to the ends of the line on both sides and contracted with Wells Fargo to carry the mail between the two terminals.",
-  "It is legal to mail poop. It is *illegal* to mail poop for the purpose of harassing someone."
+  "It is legal to mail poop. It is *illegal* to mail poop for the purpose of harassing someone.",
+  "The 1¢ stamp has never risen in price since its creation."
 ]