2012 is officially here, and what better way to kick off the New Year than with some data porn?

In its recent US Digital Media Usage report, eMarketer estimates how digital media usage will grow in 2012 in terms of the internet, mobile, social, video, and ecommerce.

So whether you need to justify your inbound marketing-centric strategies to your boss or convince yourself that inbound is the right way to approach your marketing program in 2012, check out these 25 eye-popping marketing stats that highlight the probable growth of digital media in 2012 and emphasize why you’ll definitely need inbound marketing this year.

The Internet in 2012

1) In 2012, the audience of internet users in the U.S. will expand by 3.1% to 239 million, representing 75.6% of the total population.

In other words…

2) More than 3/4 of the total population will be online in 2012

Mobile in 2012

3) Mobile internet users will reach 113.9 million in 2012, up 17.1% from 97.3 million in 2011.

4) Smartphone users will reach 106.7 million in 2012, up 18.4% from 2011.

5) In 2012, 94% of smartphones users will be mobile internet users.

6) All mobile phone users will reach 242.6 million in 2012, up 2.3% from 2011.

7) Mobile shoppers will reach 72.8 million in 2012.

8) Mobile buyers will reach 37.5 million in 2012.

9) Smartphone shoppers will reach 68.6 million in 2012.

10) Smartphone buyers will reach 36.4 million in 2012.

11) Tablet users will reach 54.8 million in 2012, up 62.8% from 33.7 million in 2011.

12) iPad users will reach 41.9 million in 2012.

13) In 2012, 76.4% of tablet users will be iPad users.

14) Adult-aged eReader users will reach 45.6 million in 2012, up from 33.3 million in 2011.

Social Media in 2012

15) Facebook will reach 143.4 million US users in 2012, up 8.2% from 132.5 million in 2011.

16) About 2/3 of web users will use social networks in 2012.

17) More than 90% of social network users will be on Facebook in 2012.

Online Video in 2012

18) Online video viewers will reach 169.3 million in 2012.

19) 53.5% of the population and 70.8% of internet users (up 7.1% from 2011) will watch online video in 2012.

20) Mobile video viewers will reach 54.6 million in 2012.

21) Smartphone video viewers will reach 51.2 million in 2012.

Ecommerce in 2012

22) 88.1% of US internet users ages 14+ will browse or research products online in 2012.

23) 83.9% of internet researchers will make at least one purchase via the web during 2012.

24) Online shoppers will reach 184.3 million in 2012, up 3.3% from 2011.

25) Online buyers will reach 154.6 million in 2012, up 4.4% from 2011.