Quarterly US GDP. 1947:1 - 2006.1.
Source
Hyndman, R.J., Koehler, A.B., Ord, J.K., and Snyder, R.D., (2008) Forecasting with exponential smoothing: the state space approach, Springer
Examples
plot(usgdp,main="Quarterly US GDP",xlab="Year",ylab="US Dollars")