SQL & PL/SQL

I am trying to insert rows in a table with certain conditions -

There is a table with fields  - ID, month, year, and value. The logic that I need to implement is if for an ID there is no row for a specific month and year then I want to insert that row into this table.

ID   Month  Year  Value

1     01        2016     2

1     02        2016    10

2     11        2015   15

2     12        2015    5

2     09        2015    8

Now, in this example, since for ID=1 Month/ Year 03/2016 is missing so in this case I would like to insert

1      03      2016     0

Similarly, Oct 2015 is missing so it wil be like

2     10     2015       0

I am not able to figure it out myself, can someone help me with this! Any help will be really appreciated!

Thanks,

Priyanka