Table 4.

The attributed values for the standard deviational ellipse.

Year	Center X(°)	Center Y(°)	XstdDist	YStdDist	Rotation angle(°)
2010	106.85	27.72	19.23	4.78	116.21
2011	111.71	27.44	21.28	1.91	117.85
2012	114.98	26.38	15.49	4.29	102.03
2013	94.63	30.42	12.69	4.85	117.05
2014	95.60	29.57	1.41	14.91	86.43
2015	117.90	31.55	0.55	2.45	79.93
2016	111.78	30.51	16.68	1.38	103.72
2017	86.24	37.62	20.37	3.04	118.43