−0.2−0.100.10.200.10.20.3195019521954195619581960−0.100.1
dy_tD12y_tz_tRolling mean (12m)Rolling std (12m)Differenced Series and Rolling StatisticsTimedy_tD12y_tz_t and rolling statsFirst Difference dy_tSeasonal Difference D12y_tCombined Difference z_t with Rolling Stats