statistics for coal reserves variation

例句：

1. 1. The statistic of the population is increasing year by year.
   人口的统计数据每年都在增长。
2. 2. The company's financial statistics show a profit margin of 20%.
   该公司的财务统计数据显示利润率为20%。
3. 3. The government released new statistics on the economy this morning.
   政府今天早上发布了关于经济的新的统计数据。