First Order Difference : 0.512987 0.411255 0.334955 0.276517 0.230952 0.194872 0.165913 0.142390 Second Order Difference : - 0.101732 - 0.076301 - 0.058438 - 0.045565 - 0.036081 - 0.028959 - 0.023522 Third Order Difference : 0.025431 0.017863 0.012873 0.009484 0.007121 0.005437 Fourth Order Difference : - 0.007569 - 0.004989 - 0.003389 - 0.002363 - 0.001684