feat: add music industry revenue dataset

Author: Riddhi8077

build/testable-projects-fcc/data/music-industry-revenue.json

@@ -0,0 +1,28 @@
+{
+  "data": [
+    ["2000-01-01", 23.1],
+    ["2001-01-01", 21.5],
+    ["2002-01-01", 19.8],
+    ["2003-01-01", 18.2],
+    ["2004-01-01", 17.9],
+    ["2005-01-01", 16.7],
+    ["2006-01-01", 15.5],
+    ["2007-01-01", 14.3],
+    ["2008-01-01", 13.1],
+    ["2009-01-01", 12.4],
+    ["2010-01-01", 13.0],
+    ["2011-01-01", 14.2],
+    ["2012-01-01", 15.1],
+    ["2013-01-01", 16.4],
+    ["2014-01-01", 17.3],
+    ["2015-01-01", 18.9],
+    ["2016-01-01", 20.1],
+    ["2017-01-01", 21.6],
+    ["2018-01-01", 22.8],
+    ["2019-01-01", 24.1],
+    ["2020-01-01", 23.9],
+    ["2021-01-01", 25.9],
+    ["2022-01-01", 26.8],
+    ["2023-01-01", 28.6]
+  ]
+}