Following our achievement of a modest rebased top line decrease and a solid 7% rebased Adjusted EBITDA growth for the first six months of 2018, we are on track to deliver on our full year 2018 outlook as presented on February 13, 2018.
Relative to the first half of 2018, we anticipate our rebased revenue growth to modestly improve driven by a growing contribution from our wholesale and small business segments and the benefit from the July 2018 rate adjustment, partially offset by continued competitive and regulatory headwinds, including a 17% reduction in the cable wholesale rate as of August 1,2018. For the full year 2018, we continue to anticipate stable revenue growth on a rebased basis.
In 2018, our full year Adjusted EBITDA(a) will be positively influenced by the accelerated synergies from the BASE acquisition, including lower MVNO-related costs as we substantially completed the full onboarding of our Full MVNO subscribers to the Telenet network at the end of Q1 2018. In addition, we will continue to focus on carefully managing our overhead expenses and indirect spend. Having achieved 7% rebased Adjusted EBITDA growth over the first six months of the year, we continue to target 7-8% rebased Adjusted EBITDA growth for the full year, leading to an improved Adjusted EBITDA(a) CAGR of 6-7% over the 2015-2018 period.
As far as our accrued capital expenditures are concerned, 2018 will be the final full year in our investment cycle characterized by relatively high investments on the back of (i) our five-year €500.0 million "Grote Netwerf" HFC network upgrade program, (ii) our €250.0 million investment in the modernization of our acquired mobile network, (iii) a full-year inclusion of SFR Belux, including on-top investments to improve the customer experience in Brussels and Wallonia, and (iv) the start of our IT platform upgrade plan, leading to additional innovative digital capabilities and cost opportunities going forward. We continue to target an accrued capital expenditures to revenue ratio of around 26% for the full year 2018, with a firm commitment to decrease our accrued capital expenditure levels as of 2019.
Finally, we continue to expect a healthy growth in our Adjusted Free Cash Flow(b) for 2018 to €400.0-420.0 million driven by (i) robust Adjusted EBITDA(a) growth as mentioned above, partially offset by higher capital expenditures, (ii) lower cash interest expenses as a result of the December 2017 refinancing and (iii) continued growth in our vendor financing platform through which we are able to extend payment terms for certain strategic suppliers.