Descriptive statistics for the stroke counts in Bratislava, on yearly basis.

There, n is the number of days in the year, for which the data are available; sd is the standard deviation of the stroke counts, Q1, Q3 are the lower and upper quartiles, percZero is the percentage of days with no stroke and nstrokes is the number of strokes in the year; other abbreviations should be self-explanatory.

此处，n为可获取对应数据的年度天数；sd为卒中（stroke）计数的标准差，Q1、Q3分别为下四分位数与上四分位数，percZero为无卒中天数的占比，nstrokes为年度卒中总次数；其余缩写的含义应不言自明。