+| .51 | 1. Added 2n-zn2 iterative data. |
+| | |
++----------------+------------------------------------------------------------+
+| .50 | 1. Added 2n-zn2 iterative data, graphs and tables. |
+| | |
++----------------+------------------------------------------------------------+
+| .49 | 1. Reorganized NAT44 graphs. |
+| | |
++----------------+------------------------------------------------------------+
+| .48 | 1. Modified the release notes. |
+| | |
++----------------+------------------------------------------------------------+