Series: log.unemp
ARIMA(2,1,2)

ar1 1.6406
ar2 -0.7499
ma1 -1.5943
ma2 0.7893

sigma^2 estimated as 0.001307: log likelihood=1530.14
AIC=‐3050.27 AICc=‐3050.2 BIC=‐3026.82

fit.best <- Arima(log.unemp, c(2, 1, 2), include.constant=FALSE)
print(fit.best)