I fudged the CPI calculation a bit because I didn't do the compounding monthly, but I ensured that based on the CPI calculator, the starting value of $11.99 -> $16.43 from January 2013 -> December 2024.
To be fair, I think CPI is somewhat bullshit, but it was the easiest .gov source for inflation data that I knew about.
Data:
Year
Basic
Standard with Ads
Standard
Premium
Premium Following CPI
CPI Inflation %
2011
$7.99
-
-
–
-
-
2012
$7.99
-
-
–
-
-
2013
$7.99
-
$9.99
$11.99
$11.99
1.58%
2014
$7.99
-
$10.99
$13.99
$12.19
-0.89%
2015
$7.99
-
$11.99
$14.99
$12.09
1.37%
2016
$7.99
-
$11.99
$14.99
$12.26
2.50%
2017
$7.99
-
$12.99
$15.99
$12.57
2.07%
2018
$7.99
-
$12.99
$15.99
$12.84
1.55%
2019
$8.99
-
$13.99
$16.99
$13.05
2.49%
2020
$8.99
-
$14.99
$18.99
$13.38
1.40%
2021
$8.99
-
$14.99
$18.99
$13.58
7.48%
2022
$9.99
-
$15.49
$19.99
$14.60
6.41%
2023
Phased Out
$6.99
$15.49
$19.99
$15.55
3.09%
2024
–
$6.99
$15.49
$22.99
$16.04
2.33%
2025
–
$7.99
$17.99
$24.99
$16.43
-
edit: fixed a calculation mistake (accidentally was using 2012->2025 inflation not 2013->2025)
edit 2: zeroed y axis