**Table 2:** Coefficients a_j,i of the multivariate fits corresponding to each of the six years.
Year	a₀₁	a₁₁	a₂₁	a₀₂	a₁₂	a₂₂	a₀₃	a₁₃	a₂₃
	$(\times10^{-4})$	$(\times10^{-4})$	$(\times10^{-4})$	$(\times10^{-6})$	$(\times10^{-6})$	$(\times10^{-6})$	$(\times10^{-10})$	$(\times10^{-10})$	$(\times10^{-10})$
1996	-1.64	11.62	-9.18	1.219	-2.721	0.638	-24.36	15.01	22.91
1997	-2.04	13.86	-11.45	1.933	-6.385	4.033	-33.97	83.00	-43.84
1998	-1.61	11.71	-9.56	1.440	-4.363	2.454	-19.58	41.10	-16.45
1999	-2.18	12.08	-9.31	0.646	-1.753	0.609	-2.22	-6.31	13.12
2000	-1.81	12.87	-10.73	0.751	-2.972	1.822	-6.64	16.02	-5.68
2001	-0.37	8.98	-8.34	0.538	-2.520	1.660	-5.84	15.38	-6.45

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