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t.. How long has your business been on the Internet? Less than 6 months 22%612 months20%1324 months 18%2536 months 19%More than 3 years20%. How long have you been publishing your newsletter(s)?Less than 6 months 54% 612 months 21% 1324 months15% 2536 months 5%More than 3 years 5%Although these two groups of numbers won39。t tell us exactly on average when a web business starts to build its mailing list, we see the discrepancy between the two groups. Many web businesses started to build their mailing lists long time after they started their web businesses. And many web businesses even haven39。t started to build their mailing lists yet. Is it not important to build an mailing list? Or some web marketers haven39。t realized the importance of marketing? If you don39。t have your own mailing list, it might be the time to start to build yours. Size of mailing listsThe size of mailing lists determines how effective your marketing strategies are.. How many mailing lists does your web business currently have?0 32% 134% 2 14%37%456%More than 58%. How many subscribers does your newsletter have?Less than 50055%5001000 14% 100120004%20015000 10%500110000 5%1000120000 1%2000150000 4%More than 50000 6%Most mailing lists are relatively small: about 69% are less than 1000 subscribers. Only about 10% of the mailing lists have more 10,000 subscribers. The size of your mailing list is also determined by what business you are in: if you are in a btob business, you are less likely to get a big subscription number. Dynamics of mailing lists The information about when to start an mailing list and the size of an mailing list discloses only the static status of an mailing list. Here we introduce some number to describe the dynamic growth of a mailing list.. On average how many new subscribers does your newsletter get EACH WEEK? Less than 536%510 24% 1120 11% 2150 9% 51100 9%More than 10010%. On average, how many subscribers unsubscribe your newsletter(s) during each publication?Less than 5 77%510 14% 1120 4%2150 3%More than 50 3%. On average what percentage of the addresses in your mailing list(s) is obsolete or invalid during each publication? Less than %40% % 22% % 10%12% 14%25%10%More than 5% 5% These numbers give us a general picture of the growth of mailing lists. Usually you won39。t expect a fast growth of your mailing list. Only about 10% of the mailing lists have more than 100 new subscribers each week. That is about 5,000 new subscribers each year. However, you have to fight frequently against the numbers of unsubscription and obsolete addresses. Usually you lose more subscribers with obsolete addresses than with unsubscriptions. Promotions The general marketing rule appli