Table 4.

Simulation results of $W_2$.

Year	${\mathit{W}}_2$	${\widehat{\mathit{W}}}_2$	${\mathit{\epsilon }}_2$
2008	5.93	5.93	0
2009	6.23	6.14	0.0914
2010	6.15	6.49	−0.3416
2011	7.06	6.86	0.1951
2012	7.31	7.26	0.0503
2013	7.87	7.68	0.1928
2014	7.94	8.12	−0.1787