from 14.9% with regular clients in Chitoor, to 99% with occasional clients in Thane brothel-based sex workers. In cases where 2001 rates are low, steep increases in condom use rates over time are seen -- for example, in Bellary, Dharmapuri, East Godavari, Guntur, Mysore and Visakhapatnam ( figure 1 ). 'Inflection points' -- points (years) at which the slope of the curve changes quite sharply -- can clearly be seen in figure 1 , for Bellary and Visakhapatnam in 2002, for Dharmapuri and Mysore in 2003, and for Guntur in 2004. In some cases, such as in Bellary and Dharmapuri, rates of increase begin to level off in more recent years, from 2005/2006 onwards, whereas in other cases, such as Guntur and Visakhapatnam, rates appear to still be increasing quite steeply. In other districts -- exemplified by Mumbai and Pune in figure 1 -- 2001 rates were already relatively high, and relatively small increases over time are seen, with quite a flat curve. IBBA rates of condom use with occasional and regular clients tend to be similar, and reconstructed rates to follow similar patterns, with somewhat lower rates for regular clients ( figure 1 , table 2 , left-hand portion). As discussed above, while in some cases the graphs in figure 1 and Web Appendix figure 1 show clear 'inflection points,' in other cases, this is not clear. In order to provide an objective measure of the rate of increase in consistent condom use rates pre- and post-Avahan implementation, we