Durbin and Koopman (2000) considered the lagged quarterly-demand for gas in the UK from 1960 to 1986.
data("gas")
A data frame with 108 observations on the following 4 variables.
y
lagged quarterly-demand for gas
year
year; 1960...1986
quarter
quarter; 1...4
time
data number for 108 obervations
Durbin, J. and Koopman, S.J. (2000). Time series analysis of nongaussian observations based on state space models from both classical and bayesian perspectives (with discussion). Journal of the Royal Statistical Society: Series B (Statistical Methodology), 62, 3--56.