I have a thrift saving plan, is 20.4% return over the past 12 months good, bad, or indifferent ?

-These are the options i have available to me:

L 2050

L 2040

L 2030

L 2020

L Income



G Fund Government Securities

F Fund Fixed Income Index

C Fund Common Stock Index

S Fund Small Cap Stock Index

I Fund International Stock Index



I really don't know what the rate of return has been over past 12 months.