Table 1.

Descriptive statistics of natural balance rates by year in the study area

Variable	1956	1960	1970	1980	1990	1999	2009	2019
Average	2.99	2.85	2.47	2.23	1.50	1.32	1.60	0.82
Median/mean	0.94	0.95	0.88	0.85	0.90	0.93	0.92	0.93
Coeff. variation	0.44	0.42	0.44	0.46	0.49	0.44	0.45	0.45
Range	2.05	2.14	2.39	2.65	3.40	2.61	2.59	3.45
Perc-range	0.62	0.54	0.61	0.62	0.50	0.60	0.61	0.47
Kurtosis	0.28	1.04	1.48	2.45	7.30	2.28	2.91	8.52
Asymmetry	0.90	1.02	1.13	1.33	2.13	1.04	1.35	1.95
Harmonic/mean	0.84	0.84	0.84	0.82	0.81	0.78	0.81	0.80
Geometric/mean	0.91	0.92	0.92	0.91	0.91	0.90	0.91	0.91