1 INTRODUCTION

2 DATA  
2.1 H I, Optical Data and Derived Quantities  
2.2 Star Formation Rates and Star Formation Efficiencies  

3 GLOBAL H I, SFR AND SFE DENSITY

4 DISCUSSION  
4.1 A Nearly Constant SFE  
4.2 SFE vs. \(SFR/M_{\star}\)  
4.3 Distribution of SFE  

5 CONCLUSIONS