We report results from a new analysis of a deep 95 \mu m imaging survey with ISOPHOT on board the Infrared Space Observatory , over a \sim 1 deg ^ { 2 } area within the Lockman Hole , which extends the statistics of our previous study ( Rodighiero et al .
2003 ) .
Within the survey area we detect sixty-four sources with S/N > 3 ( roughly corresponding to a flux limit of 16 mJy ) .
Extensive simulations indicate that the sample is almost complete at S _ { 95 \mu m } \geq 100 mJy , while the incompleteness can be quantified down to \sim 30 mJy .
The 95 \mu m galaxy counts reveal a steep slope at S _ { 95 \mu m } \leq 100 
mJy ( \alpha \simeq 1.6 ) , in excess of that expected for a non-evolving source population .
In agreement with counts data from ISO at 15 and 175 \mu m , this favours a model where the IR populations evolve both in number and luminosity densities .
We finally comment on some differences found with other ISO results in this area .