Same material but lack of Single Draw Call ?

Hi,
I have generated a Grid through script using a prefab containing Line Renderer Component as shown below,
Each horizontal and Vertical line is a modifies clone obtained by

    Insatantiate(prefab);

[33873-screen+shot+2014-10-18+at+3.28.29+pm.png|33873]

As you can see the number of draw calls is 27 all having the same Material why is that?

Line renderer cant batch you should use mesh renderer