Intervals used for accumulation studies and the number of items found in in each interval category (rounded to the nearest integer) (n = the number of replicate surveys for that interval).

Intervals used for accumulation studies and the number of items found in in each interval category (rounded to the nearest integer) (n = the number of replicate surveys for that interval).用于累积性研究的区间，以及各区间类别中发现的条目数（已按四舍五入规则取至最接近的整数）（n=该区间对应的重复调查次数）。