Riven statistics for Sortie and Archon's Hunt rewards

908 rewards.

Official droptables on Warframe.com

Reward type	Count	Percentage
Anasa Ayatan Sculpture	251	27.6%
Riven Mod	258	28.4%
Endo	100	11.0%
Kuva	104	11.5%
Booster	103	11.3%
Exilus Warframe Adapter	25	2.8%
Forma	24	2.6%
Orokin Catalyst blueprint	23	2.5%
Orokin Reactor blueprint	18	2.0%
Legendary Core	2	0.2%

Statistics for Netracell mission rewards

149 rewards.

Official droptables on Warframe.com

Reward type	Count	Percentage
Crimson Archon Shard	29	19.5%
Melee Crescendo	9	6.0%
Amber Archon Shard	32	21.5%
Melee Duplicate	14	9.4%
Azure Archon Shard	33	22.1%
Melee Arcane Adapter	32	21.5%