a decreasing trendp <0.0001
No seasonal or periodic components were clearly seen in the plot but the smoothed series generally depict a decreasing trend (Z statistic = −10.23, p <0.0001, nptrend) (Fig. 2 ).
No seasonal or periodic components were clearly seen in the plot but the smoothed series generally depict a decreasing trend (Z statistic = −10.23, p <0.0001, nptrend) (Fig. 2 ).