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:
| Vol. # | Title | Material collected | Publication date | ISBN |
| --- | --- | --- | --- | --- |
| 1.0 | Justice Be Done | JSA #1-5; JSA Secret Files #1 | April 2000 | 978-1563896200 |
| 2.0 | Darkness Falls | JSA #6-15 | August 2002 | 978-1563897399 |
| 3.0 | Return of Hawkman | JSA #16-25; JSA Secret Files #1 | November 2002 | 978-1563899126 |
| 4.0 | Fair Play | JSA #26-31; JSA Secret Files #2 | May 2003 | 978-1563899591 |
| 5.0 | Stealing Thunder | JSA #32-38 | October 2003 | 978-1563899942 |
| 6.0 | Savage Times | JSA #39-45 | November 2004 | 978-1401202538 |
| 7.0 | Princes of Darkness | JSA #46-55 | March 2005 | 978-1401204693 |
| 8.0 | Black Reign | JSA #56-58; Hawkman Vol. 4 #23-25 | July 2005 | 978-1401204808 |
| 9.0 | Lost | JSA #59-67 | September 2005 | 978-1401207229 |
| 10.0 | Black Vengeance | JSA #68-75 | March 2006 | 978-1401209667 |
| 11.0 | Mixed Signals | JSA #76-81 | September 2006 | 978-1401209674 |
| 12.0 | Ghost Stories | JSA #82-87 | January 2007 | 978-1401211967 |
Question:
How many Volume Numbers have the title of Darkness Falls?
Answer:
2.0