Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Park | Country | Inversions | Opened | Status |
| --- | --- | --- | --- | --- | --- |
| Bizarro Formerly Medusa | Six Flags Great Adventure | United States | 7.0 | April 2, 1999 | Operating |
| Superman: Krypton Coaster | Six Flags Fiesta Texas | United States | 6.0 | March 11, 2000 | Operating |
| Medusa | Six Flags Discovery Kingdom | United States | 7.0 | March 18, 2000 | Operating |
| Kraken | Sea World Orlando | United States | 7.0 | June 1, 2000 | Operating |
| Insane Speed | Janfusun Fancyworld | Taiwan | 4.0 | 2001 | Operating |
| Superman: La Atracción de Acero | Parque Warner Madrid | Spain | 7.0 | April 6, 2002 | Operating |
| Batman: The Dark Knight | Six Flags New England | United States | 5.0 | April 20, 2002 | Operating |
| Scream | Six Flags Magic Mountain | United States | 7.0 | April 12, 2003 | Operating |
| Dæmonen | Tivoli Gardens | Denmark | 3.0 | April 16, 2004 | Operating |
| Hydra the Revenge | Dorney Park & Wildwater Kingdom | United States | 7.0 | May 7, 2005 | Operating |
| Dominator Formerly Batman: Knight Flight | Kings Dominion Geauga Lake | United States | 5.0 | May 24, 2008 May 5, 2000 | Operating Closed September 16, 2007 |
| Hair Raiser | Ocean Park Hong Kong | Hong Kong | 4.0 | December 8, 2011 | Operating |
| Nitro | Adlabs Imagica | India | 5.0 | 2013 | Operating |
Question:
Name the sum of inversions for opened of april 20, 2002
Answer:
5.0